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1. 58 OBD2 DTC Definitions GENERIC P0474 P0517 Code Definition P0474 Exhaust Pressure Sensor Intermittent P0475 Exhaust Pressure Control Valve Malfunction P0476 Exhaust Pressure Control Valve Range Performance P0477 Exhaust Pressure Control Valve Low P0478 Exhaust Pressure Control Valve High P0479 Exhaust Pressure Control Valve Intermittent P0480 Cooling Fan 1 Control Circuit Malfunction P0481 Cooling Fan 2 Control Circuit Malfunction P0482 Cooling Fan 3 Control Circuit Malfunction P0483 Cooling Fan Rationality Check Malfunction P0484 Cooling Fan Circuit Over Current P0485 Cooling Fan Power Ground Circuit Malfunction P0486 Exhaust Gas Recirculation Sensor B Circuit P0487 Exhaust Gas Recirculation Throttle Position Control Circuit P0488 Exhaust Gas Recirculation Throttle Position Control Range Performance P0491 Secondary Air Injection System Bank 1 P0492 Secondary Air Injection System Bank 2 P0500 Vehicle Speed Sensor Malfunction P0501 Vehicle Speed Sensor Range Performance P0502 Vehicle Speed Sensor Circuit Low Input P0503 Vehicle Speed Sensor Intermittent Erratic High P0505 Idle Control System Malfunction P0506 Idle Control System RPM Lower Than Expected P0507 Idle Control System RPM Higher Than Expected P0508 Idle Control System Circuit Low P0509 Idle Control System Circuit High P0510 Closed Throttle Position Switch Malfunction P0512 Starter Request Circuit P0513 Incorrect Immobili
2. P1284 Fuel Injection pump battery voltage sensor out of range P1285 Fuel Injection pump controller always on P1286 Accelerator Position Sensor APPS supply voltage too high P1287 Fuel Injection pump Controller Supply voltage low P1288 Intake manifold short runner tuning valve solenoid circuit P1289 Manifold tune valve solenoid circuit P1290 CNG Fuel system pressure too high P1291 No Temp rise seen from intake heaters P1292 CNG Pressure sensor voltage too high P1293 CNG Pressure sensor voltage too low P1294 Target idle not reached P1295 No 5 volts to TP sensor P1296 No 5 volts to MAP sensor P1297 No change in MAP sensor from start to run P1298 lean operation at wide open throttle P1299 Vacuum Leak detected IAC fully seated P1300 Ignition timing adjustment circuit failure P1388 Auto shutdown relay control circuit P1389 No ASD relay output voltage at PCM OBD2 67 DTC Definitions CHRYSLER P1390 P1596 Code Definition P1390 Timing belt skipped one tooth or more P1391 Intermittent loss of CMP or CKP P1398 Mis Fire Adaptive Numerator at Limit PCM is unable to learn the crank sensors signal for use in preparation for misfire diagnostics P1399 Wait to start lamp circuit P1403 No 5 volt feed to EGR P1475 Auxiliary 5 volt supply is too high P1476 Too little
3. P1899 Park Neutral switch stuck in park or gear OBD2 69 DTC Definitions FORD P1000 P1133 MANUFACTURER SPECIFIC CODES FORD Code Definition P1000 OBD Systems Readiness Test Not Complete P1001 KOER Not Able to Complete KOER Aborted P1100 Mass Air Flow Sensor Circuit Intermittent P1101 Mass Air Flow Sensor Out Of Self Test Range P1105 Dual Alternator Upper Fault P1106 Dual Alternator Lower Fault P1107 Dual Alternator Lower Circuit P1108 Dual Alternator Lower Circuit P1109 Intake Air Temperature B Circuit Intermittent P1111 System Pass P1112 Intake Air Temperature Circuit Intermittent P1114 Intake Air Temperature B Circuit Low Input Super Turbo Charged engines P1115 Intake Air Temperature B Circuit High Input Super Turbo Charged engines P1116 Engine Coolant Temperature Sensor Out Of Self Test Range P1117 Engine Coolant Temperature Sensor Circuit Intermittent P1118 Manifold Air Temperature Circuit Low Input P1119 Manifold Air Temperature Circuit High Input P1120 Throttle Position Sensor A Out Of Range Low Ratch too low P1121 Throttle Position Sensor A Inconsistent With Mass Air Flow Sensor P1122 Pedal Position Sensor A Circuit Low Input P1123 Pedal Position Sensor A Circuit High Input P1124 Throttle Position Sensor A Out Of Self Test Range P1125 Throttle Position Sensor A Intermittent P1127 Exhaust Not Warm Downstream O2 Sensor Not Tested P1128
4. OBD2 51 DTC Definitions GENERIC P0237 P0270 Code Definition P0237 Turbocharger Boost Sensor A Circuit Low P0238 Turbocharger Boost Sensor A Circuit High P0239 Turbocharger Boost Sensor B Circuit Malfunction P0240 Turbocharger Boost Sensor B Circuit Range Performance P0241 Turbocharger Boost Sensor B Circuit Low P0242 Turbocharger Boost Sensor B Circuit High P0243 Turbocharger Wastegate Solenoid A Malfunction P0244 Turbocharger Wastegate Solenoid A Range Performance P0245 Turbocharger Wastegate Solenoid A Low P0246 Turbocharger Wastegate Solenoid A High P0247 Turbocharger Wastegate Solenoid B Malfunction P0248 Turbocharger Wastegate Solenoid B Range Performance P0249 Turbocharger Wastegate Solenoid B Low P0250 Turbocharger Wastegate Solenoid B High P0251 Injection Pump A Rotor Cam Malfunction P0252 Injection Pump A Rotor Cam Range Performance P0253 Injection Pump A Rotor Cam Low P0254 Injection Pump A Rotor Cam High P0255 Injection Pump A Rotor Cam Intermitted P0256 Injection Pump B Rotor Cam Malfunction P0257 Injection Pump B Rotor Cam Range Performance P0258 Injection Pump B Rotor Cam Low P0259 Injection Pump B Rotor Cam High P0260 Injection Pump B Rotor Cam Intermitted P0261 Oylinder 1 Injector Circuit Low P0262 Oylinder 1 Injector Circuit High P0263 Cylinder 1 Contribution Balance Fault P0264 Cylinder 2 Injector
5. P1701 Reverse Engagement Error P1702 Transmission Range Sensor Circuit Intermittent P1703 Brake Switch Out Of Self Test Range P1704 Transmission Range Circuit Not Indicating Park Neutral During Self Test P1705 Transmission Range Circuit Not Indicating Park Neutral During Self Test P1709 Park Neutral Position Switch Out Of Self Test Range P1711 Transmission Fluid Temperature Sensor Out Of Self Test Range P1712 Transmission Torque Reduction Request Signal P1713 Transmission Fluid Temperature Sensor In Range Failure 50 deg F P1714 Shift Solenoid A Inductive Signature P1715 Shift Solenoid B Inductive Signature P1716 Shift Solenoid C Inductive Signature OBD2 79 DTC Definitions FORD P1717 P1785 Code Definition P1717 Shift Solenoid D Inductive Signature P1718 Transmission Fluid Temperature Sensor In Range Failure 250 deg F P1727 Coast Clutch Solenoid Inductive Signature P1728 Transmission Slip P1729 4x4L Switch P1731 1 2 Shift Malfunction P1732 2 3 Shift Malfunction P1733 3 4 Shift Malfunction P1740 Torque Converter Clutch Solenoid Inductive Signature P1741 Torque Converter Clutch Solenoid Control Error P1742 Torque Converter Clutch Solenoid Circuit Failed On P1743 Torque Converter Clutch Solenoid Circuit Failed On P1744 Torque Converter Clutch Solenoid Circuit Performance P1746 Press
6. CHRYSLER FORD GENERAL MOTORS HONDA and TOYOTA only For DTC definitions that are not in these lists and or for Body Chassis and Network DTC definitions reference your vehicle s service manual OBD 2 45 DTC Definitions GENERIC P0010 P0057 GENERIC DTC DEFINITIONS Code P0010 Definition A Camshaft Position Actuator Circuit Bank 1 P0011 A Camshaft Position Timing Over Advanced or System Performance Bank 1 P0012 A Camshaft Position Timing Over Retarded Bank 1 P0013 B Camshaft Position Actuator Circuit Bank 1 P0014 B Camshaft Position Timing Over Advanced or System Performance Bank 1 P0015 B Camshaft Position Timing Over Retarded Bank 1 P0020 A Camshaft Position Actuator Circuit Bank 2 P0021 A Camshaft Position Timing Over Advanced or System Performance Bank 2 P0022 A Camshaft Position Timing Over Retarded Bank 2 P0023 B Camshaft Position Actuator Circuit Bank 2 P0024 B Camshaft Position Timing Over Advanced or System Performance Bank 2 P0025 B Camshaft Position Timing Over Retarded Bank 2 P0030 HO2S Heater Control Circuit Bank 1 Sensor 1 P0031 HO2S Heater Control Circuit Low Bank 1 Sensor 1 P0032 HO2S Heater Control Circuit High Bank 1 Sensor 1 P0033 Turbo Charger Bypass Valve Control Circuit P0034 Turbo Charger Bypass Va
7. Circuit High Input P0184 Fuel Temperature Sensor A Circuit Intermittent P0185 Fuel Temperature Sensor B Circuit Malfunction P0186 Fuel Temperature Sensor B Circuit Range Performance P0187 Fuel Temperature Sensor B Circuit Low Input P0188 Fuel Temperature Sensor B Circuit High Input P0189 Fuel Temperature Sensor B Circuit Intermittent P0190 Fuel Rail Pressure Sensor Circuit Malfunction P0191 Fuel Rail Pressure Sensor Circuit Range Performance P0192 Fuel Rail Pressure Sensor Circuit Low Input P0193 Fuel Rail Pressure Sensor Circuit High Input P0194 Fuel Rail Pressure Sensor Circuit Intermittent P0195 Engine Oil Temperature Sensor Malfunction P0196 Engine Oil Temperature Sensor Range Performance P0197 Engine Oil Temperature Sensor Low P0198 Engine Oil Temperature Sensor High P0199 Engine Oil Temperature Sensor Intermittent P0200 Injector Circuit Malfunction P0201 Injector Circuit Malfunction Cylinder 1 P0202 Injector Circuit Malfunction Cylinder 2 P0203 Injector Circuit Malfunction Cylinder 3 P0204 Injector Circuit Malfunction Cylinder 4 50 OBD2 DTC Definitions GENERIC P0205 P0236 Code Definition P0205 Injector Circuit Malfunction Cylinder 5 P0206 Injector Circuit Malfunction Cylinder 6 P0207 Injector Circuit Malfunction Cylinder 7 P0208 Injector Circuit Malfunction Cylinder 8 P0209 Injector Circuit Malfunction Cylinder 9 P02
8. DIAGNOSIS WORKSHEET AUTOMATIC TRANSMISSION PROBLEMS if applicable Q No symptoms C Shifts too early or too late C Changes gear incorrectly PROBLEM OCCURS Q Morning Q Afternoon CL Vehicle does not move when in gear Q Jerks or bucks C Anytime ENGINE TEMPERATURE WHEN PROBLEM OCCURS Q Cold Q Warm LC Hot DRIVING CONDITIONS WHEN PROBLEM OCCURS Short less than 2 miles 2 10 miles Long more than 10 miles Stop and go While turning While braking At gear engagement With A C operating DODCODCOCOCOU DRIVING HABITS C Mostly city driving Q Highway Q Park vehicle inside C Park vehicle outside GASOLINE USED Q 87 Octane Q 89 Octane With headlights on During acceleration Mostly driving downhill Mostly driving uphill Mostly driving level Mostly driving curvy roads Mostly driving rough roads mE mE mi mE mi mi m Drive less than 10 miles per day Drive 10 to 50 miles per day Drive more than 50 miles per day OOO m m 91 Octane More than 91 Octane WEATHER CONDITIONS WHEN PROBLEM OCCURS Q 32 55 F 0 13 C C Below freezing 32 F 0 C Q Above 55 F 13 C CHECK ENGINE LIGHT DASH WARNING LIGHT Q Sometimes ON C Always ON C Never ON PECULIAR SMELLS C Hot C Gasoline C Sulfur rotten egg C Burning oil Q Burning rubber Q Electrical STRANGE NOISES Q Rattle Q Squeak C Knock C Other 16 OBD2 Using Code Reade
9. Failure A SEA SEFA TMA TMB Signal Line Failure P1660 A T FI Signal A Circuit Failure P1681 A T FI Signal A Low Input P1682 A T FI Signal A High Input P1686 A T FI Signal B Low Input P1687 A T FI Signal B Low Input 94 OBD2 DTC Definitions TOYOTA P1100 P1346 MANUFACTURER SPECIFIC CODES TOYOTA Code Definition P1100 BARO Sensor Circuit malfunction P1120 Accelerator Pedal Position Sensor Circuit Malfunction P1121 Accelerator Pedal Position Sensor Range Performance Problem P1125 Throttle Control Motor Circuit Malfunction P1126 Magnetic Clutch Circuit Malfunction P1127 ETCS Actuator Power Source Circuit Malfunction P1128 Throttle Control Motor Lock Malfunction P1129 Electric Throttle Control System Malfunction P1130 Air Fuel Sensor Circuit Range Performance P1133 Air Fuel Sensor Circuit Response Malfunction P1135 Air Fuel Sensor Heater Circuit Response Malfunction P1150 A F Sensor Circuit Range Performance Malfunction P1153 AJF Sensor Circuit Response Malfunction P1155 A F Sensor Heater Circuit Malfunction P1200 Fuel Pump Relay Circuit Malfunction P1300 Igniter Circuit Malfunction No 1 P1305 Igniter Circuit Malfunction No 2 1998 2000 Land Cruiser 2000 Celica amp Tundra P1310 Igniter Circuit Malfunction No 2 Except 1998 2000 Land Cruiser 2000 Celica amp Tundra P1310 Igniter Circuit Malfunction No 3 1998 2000 L
10. Fluid Temperature Sensor Circuit High Input P0714 Transmission Fluid Temperature Sensor Circuit Intermittent P0715 Input Turbine Speed Sensor Circuit Malfunction P0716 Input Turbine Speed Sensor Circuit Range Performance P0717 Input Turbine Speed Sensor Circuit No Signal P0718 Input Turbine Speed Sensor Circuit Intermittent P0719 Torque Converter Brake Switch B Circuit Low P0720 Output Speed Sensor Circuit Malfunction P0721 Output Speed Sensor Circuit Range Performance P0722 Output Speed Sensor Circuit No Signal P0723 Output Speed Sensor Circuit Intermittent P0724 Torque Converter Brake Switch B Circuit High P0725 Engine Speed Input Circuit Malfunction P0726 Engine Speed Input Circuit Range Performance P0727 Engine Speed Input Circuit No Signal P0728 Engine Speed Input Circuit Intermittent P0730 Incorrect Gear Ratio P0731 Gear 1 Incorrect Ratio P0732 Gear 2 Incorrect Ratio P0733 Gear 3 Incorrect Ratio P0734 Gear 4 Incorrect Ratio P0735 Gear 5 Incorrect Ratio P0736 Reverse Incorrect Ratio P0737 TCM Engine Speed Output Circuit P0738 TCM Engine Speed Output Circuit Low P0739 TCM Engine Speed Output Circuit High P0740 Torque Converter Clutch Circuit Malfunction P0741 Torque Converter Clutch Circuit Performance or Stuck Off P0742 Torque Converter Clutch Circuit Stuck On P0743 Torque Converter Clutch Circuit Electrical P0744 Torque Converter Clutch Circuit Intermittent P0745 Pressure
11. HO2 Sensor Heater Control Circuit Bank 1 Sensor 2 P1153 HO2S Insufficient Switching Bank 2 Sensor 1 P1154 HO2S Transition Time Ratio Bank 2 Sensor 1 P1158 HO2 Sensor Shift Rich Bank 2 Sensor 2 Engine Metal Over Temperature Protection P1161 HO2 Sensor Heater Control Circuit Bank 2 Sensor 2 P1171 Fuel System Lean During Acceleration P1187 Engine Oil Temperature Sensor Circuit Voltage Low except 1997 Corvette P1187 Engine Oil Pressure Sensor Circuit Voltage Low 1997 Corvette P1188 Engine Oil Temperature Sensor Circuit Voltage High except 1997 Corvette OBD2 83 DTC Definitions GENERAL MOTORS P1188 P1320 Code Definition P1188 Engine Oil Pressure Sensor Circuit Voltage High 1997 Corvette P1189 Engine Oil Pressure Switch Circuit P1200 Injector Control Circuit P1214 Injection Pump Timing Offset P1215 Generator Driver Circuit P1216 Fuel Solenoid Response Time Too Short P1217 Fuel Solenoid Response Time Too Long P1218 Injection Pump Calibration Circuit P1220 Throttle Position TP Sensor 2 Circuit Fault P1221 TP Sensor 1 2 Performance P1222 Injector Control Circuit Intermittent P1250 Early Fuel Evaporative EFE Heater Circuit P1257 Boost Control Condition Supercharge System Overboost P1260 Fuel Pump Speed Relay Control Circuit P1271 Accelerator P
12. P1605 Knock Control CPU Malfunction P1630 Traction Control System Malfunction P1633 ECM Malfunction ECTS Circuit P1645 Body ECU Malfunction P1652 P1656 IACV Control Circuit Malfunction OCV Circuit Malfunction P1658 Waste Gate Valve Control Circuit Malfunction P1661 EGR Circuit Malfunction P1662 EGR By Pass Valve Control Circuit Malfunction P1690 OCV Circuit Malfunction P1692 OCV Open Malfunction P1693 OCV Closed Malfunction P1780 PNP Switch Malfunction 96 OBD 2 Glossary GLOSSARY OF TERMS AND ABBREVIATIONS INTRODUCTION This Glossary contains definitions for abbreviations and terms you may find in this manual or in your vehicle service manual GLOSSARY OF TERMS AND ABBREVIATIONS CARB California Air Resources Board CCM Central Control Module Computer Control System An electronic control system consisting of an on board computer and related sensors switches and actuators used to ensure peak performance and fuel efficiency while reducing pollutants in the vehicle s emissions DIY Do It Yourself DLC Data Link Connector Drive Cycle An extended set of driving procedures that takes into consideration the various types of driving conditions encountered in real life Driving Condition A specific environmental or operation condition under which a vehicle is operated such as starting the vehicle when cold dr
13. SBDS Interactive Codes P1611 SBDS Interactive Codes P1612 SBDS Interactive Codes P1613 SBDS Interactive Codes P1614 SBDS Interactive Codes P1615 SBDS Interactive Codes P1616 SBDS Interactive Codes P1617 SBDS Interactive Codes P1618 SBDS Interactive Codes P1618 SBDS Interactive Codes P1619 SBDS Interactive Codes P1620 SBDS Interactive Codes P1625 Fan Driver Circuit Open to Power B VLCM 78 OBD 2 DTC Definitions FORD P1626 P1716 Code Definition P1626 A C Circuit Open to Power B VLCM P1633 Keep Alive Power Voltage Too Low P1635 Tire Axle Out of Acceptable Range P1636 Inductive Signature Chip Communication Error P1639 Vehicle ID Block Corrupted Not Programmed P1640 Powertrain DTCs Available In Another Control Module Ref PID 0946 P1641 Fuel Pump Primary Circuit P1642 CAN Link Circuit P1642 Fuel Pump Monitor Circuit Low Input DTC will be deleted on next version P1643 CAN Link ECM TOM Circuit Network P1643 Fuel Pump Monitor Circuit Low Input DTC will be deleted on next version P1644 Fuel Pump Speed Control Circuit P1650 Power Steering Pressure Switch Out Of Self Test Range P1651 Power Steering Pressure Switch Input P1656 CAN Link PCM PCM Circuit Network P1657 CAN Link Chip Malfunction P1700 Transmission Indeterminate Failure Failed to Neutral
14. Switch Circuit Short To Ground P1819 Neutral Safety Switch Input Short To Ground P1820 Transfer Case LO To HI Shift Relay Circuit Open Or Short To Ground P1822 Transfer Case LO To HI Shift Relay Coil Short To Battery P1824 4 Wheel Drive Electric Clutch Relay Open Or Short To Ground P1826 4 Wheel Drive Electric Clutch Relay Short To Battery P1828 Transfer Case HI To LO Shift Relay Coil Circuit Open Or Short To Ground P1830 Transfer Case HI To LO Shift Relay Coil Circuit Short To Battery P1832 Transfer Case 4 Wheel Drive Solenoid Circuit Open or Short To Ground P1834 Transfer Case 4 Wheel Drive Solenoid Circuit Short To Battery P1838 No Shift Motor Movement Detected P1846 Transfer Case Contact Plate A Circuit Open P1850 Transfer Case Contact Plate B Circuit Open P1854 Transfer Case Contact Plate C Circuit Open P1858 Transfer Case Contact Plate D Circuit Open P1866 Transfer Case Cannot Be Shifted P1867 Transfer Case Contact Plate General Circuit Failure P1876 Transfer Case 2 Wheel Drive Solenoid Circuit Open Or Short To Ground P1877 Transfer Case 2 Wheel Drive Solenoid Circuit Short To Battery P1881 Engine Coolant Level Switch Circuit P1882 Engine Coolant Level Switch Circuit Short To Ground OBD2 81 DTC Definitions FORD P1883 P1901 Code P1883 Definition Engine Coolant Level Switch Circuit P1884 Engine Coolant
15. a temperature of at least 600 650 F and the engine must reach normal operating temperature for the computer to enter into closed loop operation The oxygen sensor only functions when the computer is in closed loop A properly operating oxygen sensor reacts quickly to any change in oxygen content in the exhaust stream A faulty oxygen sensor reacts slowly or its voltage signal is weak or missing The oxygen sensor is a Two Trip monitor If a fault is found on the first trip the computer temporarily saves the fault in its memory as a Pending Code The computer does not command the MIL on at this time If the fault is sensed again on the second trip the computer commands the MIL On and saves the code in its long term memory Secondary Air System Monitor When a cold engine is first started it runs in open loop mode During open loop operation the engine usually runs rich A vehicle running rich wastes fuel and creates increased emissions such as carbon monoxide and some hydrocarbons A Secondary Air System injects air into the exhaust stream to aid catalytic converter operation 1 It supplies the catalytic converter with the oxygen it needs to oxidize the carbon monoxide and hydrocarbons left over from the combustion process during engine warm up 2 The extra oxygen injected into the exhaust stream also helps the catalytic converter reach operating temperature more quickly during warm up periods The catalytic converter must h
16. and testing of its assigned engine System it means the monitor HAS RUN m f a Monitor has not yet met all the conditions required for it to perform the self diagnosis and testing of its assigned engine System it means the Monitor HAS NOT RUN The Monitor Run Not Run status does not show whether or not a problem exists in a system Monitor status only indicates whether a particular Monitor has or has not run and performed the self diagnosis and testing of its associated system Performing I M Readiness Quick Check When a vehicle first comes from the factory all Monitors indicate a DONE status This indicates that all Monitors have run and completed their diagnostic testing The DONE status remains in the computer s memory unless the Diagnostic Trouble Codes are erased or the vehicle s computer memory is cleared Code Reader allows you to retrieve Monitor System Status Information to help you determine if the vehicle is ready for an Emissions Test Smog Check In addition to retrieving Diagnostic Trouble Codes Code Reader also retrieves Monitor Run Not Run OBD2 23 Using Code Reader I M READINESS TESTING status This information is very important since different areas of the state country have different emissions laws and regulations concerning Monitor Run Not Run status Before an Emissions Test Smog Check can be performed your vehicle must meet certain rules requirements and procedures legislated by the
17. definition s and see the vehicle s service manual for further evaluation ERASING DIAGNOSTIC TROUBLE CODES DTCs 3m When Code Reader s ERASE function is used to erase the DTCs from the vehicle s on board computer Freeze Frame data and manufacturer specific enhanced data are also erased If you plan to take the vehicle to a Service Center for repair DO NOT erase the codes from the vehicle s computer If the codes are erased valuable information that might help the technician troubleshoot the problem will also be erased Erase DTCs from the computer s memory as follows 20 When DTCs are erased from the vehicle s computer memory the I M Readiness Monitor Status program resets status of all the Monitors to a not run flashing condition To set all of the Monitors to a DONE status an OBD 2 Drive Cycle must be performed Refer to your vehicle s service manual for information on how to perform an OBD 2 Drive Cycle for the vehicle under test OBD2 Using Code Reader I M READINESS TESTING 1 Perform the Code Retrieval Procedure as described on page 17 2 Wait until the codes are displayed on the Code Reader s LCD and then proceed to step 3 3 Press and release Code Reader s Y J M MONITOR STATUS PENDING ni ERASE iar button The LCD display 000000 fa UL will indicate SurE for your confirmation 0000 m f you change your mind and do not D rE wish to erase the codes press the LI LINK button to
18. fuel mixture corrections In order for the computer to enter closed loop operation the oxygen sensor must reach a temperature of at least 600 F The oxygen sensor heater helps the oxygen sensor reach and maintain its minimum operating temperature 600 F more quickly to bring the vehicle into closed loop operation as soon as possible The Oxygen Sensor Heater Monitor is a Two Trip Monitor If a fault is found on the first trip the computer temporarily saves the fault in its memory as a Pending Code The computer does not command the MIL on at this time If the fault is sensed again on the second trip the computer commands the MIL On and saves the code in its long term memory m Oxygen Sensor Monitor The Oxygen Sensor monitors how much oxygen is in the vehicle s exhaust It generates a varying voltage of up to one volt based on how much oxygen is in the exhaust gas and sends the signal to the computer The computer uses this signal to make corrections to the air fuel mixture If the exhaust gas has a large amount of oxygen a lean air fuel mixture the oxygen sensor generates a low voltage signal If the exhaust gas has very little oxygen a rich mixture condition the oxygen sensor generates a high voltage signal A 450mV signal indicates the most efficient and least polluting air fuel ratio of 14 7 parts of air to one part of fuel 42 OBD2 OBD2 Learning More OBD 2 MONITORS The oxygen sensor must reach
19. manifold It helps to oxidize burn the unburned fuel hydrocarbons and partially burned fuel carbon monoxide left over from the combustion process To accomplish this heat and catalyst materials inside the converter react with the exhaust gases to burn the remaining fuel Some materials inside the catalytic converter also have the ability to store oxygen and release it as needed to oxidize hydrocarbons and carbon monoxide In the process it reduces vehicle emissions by converting the polluting gases into carbon dioxide and water The computer checks the efficiency of the catalytic converter by monitoring the oxygen sensors used by the system One sensor is located before upstream of the converter the other is located after downstream of the converter If the catalytic converter loses its ability to store oxygen the downstream sensor signal voltage becomes almost the same as the upstream sensor signal In this case the monitor fails the test The Catalyst Monitor is a Two Trip Monitor If a fault is found on the first trip the computer temporarily saves the fault in its memory as a Pending Code The computer does not command the MIL on at this time If the fault is sensed again on the second trip the computer commands the MIL On and saves the code in its long term memory 40 OBD 2 OBD2 Learning More OBD 2 MONITORS Heated Catalyst Monitor Operation of the heated catalytic converter is similar to the ca
20. occurs when the air fuel mixture in the cylinder does not ignite The misfire Monitor uses changes in crankshaft speed to sense an engine misfire When a cylinder misfires it no longer contributes to the speed of the engine and engine speed decreases each time the affected cylinder s misfire The misfire Monitor is designed to sense engine speed fluctuations and determine from which cylinder s the misfire is coming as well as how bad the misfire is There are three types of engine misfires Types 1 2 and 3 Type 1 and Type 3 misfires are two trip monitor faults If a fault is sensed on the first trip the computer temporarily saves the fault in its memory as a Pending Code The MIL is not commanded on at this time If the fault is found again on the second trip under similar conditions of engine speed load and temperature the computer commands the MIL On and the code is saved in its long term memory Type 2 misfires are the most severe type of misfire When a Type 2 misfire is sensed on the first trip the computer commands the MIL to light when the misfire is sensed If the computer determines that a Type 2 misfire is severe and may cause catalytic converter damage it commands the MIL to flash once per second as soon as the misfire is sensed When the misfire is no longer present the MIL reverts to steady On condition m Catalyst Monitor The catalytic converter is a device that is installed downstream of the exhaust
21. on page 35 for more information about pending codes MONITOR STATUS If Code Reader s LCD display shows a zero indicating there are no DTCs present in the vehicle s computer but the yellow LED is lit it indicates a Monitor Has Not Run status This means that some of the Monitors on the vehicle have not yet finished their diagnostic self testing This condition is confirmed by one or more blinking Monitor icons on the LCD display A blinking Monitor icon means the Monitor has not yet run and finished its diagnostic self testing All Monitor icons that are solid have completed their diagnostic self testing For more information on Monitors see OBD 2 Monitors on page 38 m Red LED Indicates there is a problem with one or more of the vehicle s systems The red LED is also used to show that DTC s are present displayed on Code Reader s LCD display In this case the Multifunction Indicator Check Engine lamp on the vehicle s instrument panel will light steady on Code Reader will automatically re link to the vehicle s computer every 15 seconds to refresh the data being retrieved When data is being refreshed a single beep will sound and rEAd will be shown on the LCD display for 5 6 seconds Code Reader will then beep twice and return to displaying codes This action repeats as long as Code Header is in communication with the vehicle s computer ae Code Reader will display a code only if codes are present in the vehic
22. or red LEDs light you can choose to m Fix the problem yourself If you choose to fix the problem yourself read and follow all of the vehicle service manual s recommendations and procedures m Take your vehicle to an Automotive Service Center for repair Take your vehicle a copy of the completed Preliminary Vehicle Diagnosis Worksheet see page 14 and codes retrieved to your technician for evaluation This will show your technician that you are an informed motorist and will also assist him in pinpointing the location of the problem as a starting point for needed repairs If the red LED lights after retrieving codes or performing an I M Readiness inspection it is suggested that the vehicle be inspected repaired before driving the vehicle further 28 OBD2 Learning More COMPUTER ENGINE CONTROLS COMPUTER ENGINE CONTROLS The Introduction of Electronic Engine Controls Electronic Computer Control Systems make it possible for vehicle manufacturers to comply with the tougher emissions and fuel efficiency standards mandated by State and Federal Governments As a result of increased air pollution smog in large cities such as Los Angeles the California Air Resources Board CARB and the Environmental Protection Agency EPA set new regulations and air pollution standards to deal with the problem To further complicate matters the energy crisis of the early 1970s caused a sharp increase in fuel prices over a short
23. return to the code retrieval function m f you wish to continue press and release the ERASE m button again m The LCD will display donE for a few seconds and then will auto 2809999 Ei matically enter the re link read mode to confirm that all retrievable information including DTCs have been successfully erased cleared from the computer memory m lf the erase was successful the LCD display will show zero 0 codes and some of the Monitors icons will be flashing to indicate that the Monitors have been re set Erasing DTCs does not fix the problem s that caused the code s to be set If proper repairs to correct the problem that caused the code s to be set are not made the code s will appear again and the check engine light will illuminate as soon as the vehicle is driven long enough for its Monitors to complete their testing I M READINESS TESTING I M is an Inspection and Maintenance program legislated by the Government to meet federal clean air standards The program requires that a vehicle be taken periodically to an Emissions Station for an Emissions Test or Smog Check where the emissions related components and systems are inspected and tested for proper operation Emissions Tests are generally performed once a year or once every two years OBD 2 21 Using Code Reader I M READINESS TESTING On OBD 2 systems the I M program is enhanced by requiring vehicles to meet stricter te
24. secondary air P1477 Too much secondary air P1478 Battery Temp Sensor Volts out of limit P1479 Transmission Fan Relay Circuit P1480 PCV Solenoid Circuit P1481 EATX Electronic Automatic Transaxle RPM pulse generator performance P1482 Catalyst Temperature Sensor Circuit shorted low P1483 Catalyst Temperature Sensor Circuit shorted high P1484 Catalytic Converter overheat detected P1485 Air injection solenoid circuit P1486 EVAP Leak Monitor found a pinched hose P1487 Hi Speed Fan 2 Circuit P1488 Auxiliary 5 volt supply output is too low P1489 High speed fan control relay circuit P1490 Low speed fan control relay circuit P1491 Radiator fan relay control circuit P1492 Ambient Battery Temp sensor input voltage too high P1493 Ambient Battery Temp sensor input voltage too low P1494 Leak detection pump pressure switch or mechanical fault P1495 Leak detection pump solenoid circuit P1496 5 volt supply output too low P1498 High speed radiator fan ground control relay circuit P1500 General alternator FR Terminal circuit fault P1594 Charging system voltage too high P1595 Speed control solenoid circuits P1596 Speed control switch always high 68 OBD 2 DTC Definitions CHRYSLER P1597 P1899 Code Definition P1597 Speed control switch always low P1598 A C pressure sensor input voltage too high P1599 A C pressure sensor input voltage too low P1680 Clutch released switch circuit P1681 No I P Cluster CCD J
25. switches are input devices They provide signals representing current engine operating conditions to the computer Actuators are output devices They perform actions in response to commands received from the computer The on board computer receives information inputs from sensors and switches located throughout the engine These devices monitor critical engine conditions such as coolant temperature engine speed engine load throttle position air fuel ratio etc TYPICAL COMPUTER OUTPUT DEVICES CONTROL SYSTEM Fuel Injectors Idle Air Control EGR Valve Ignition Module T Nw On Board Computer INPUT DEVICES Coolant Temperature Sensor Throttle Position Sensor Fuel Injectors INPUT DEVICES Oxygen Sensors 30 OBD2 Learning More COMPUTER ENGINE CONTROLS The computer compares the values received from these sensors with its preset reference values and makes corrective actions as needed so that the sensor values always match the preset reference values for the current driving condition The computer makes adjustments by commanding other devices such as the fuel injectors idle air control EGR valve or Ignition Module to perform these actions Vehicle operating conditions are constantly changing The computer continuously makes adjustments or corrections especially to the air fuel mixture and spark timing to keep all the engine systems operating within the preset reference values On Board Diagnostics First Ge
26. tS m Misfire and fuel system faults require three trips with similar conditions before the MIL is turned Off These are trips where the engine load RPM and temperature are similar to the conditions present when the fault was first found After the MIL has been turned off DTCs Freeze Frame data and manufacturer specific enhanced data stay in the computer s memory This data can only be retrieved by using equipment such as a Scan Tool m Erasing the DTCs from the computer s memory can also turn off the MIL See ERASING DIAGNOSTIC TROUBLE CODES DTCs on page 20 before erasing codes from the computer s memory If a Code Reader or Scan Tool is used to erase the codes Freeze Frame data as well as other manufacturer specific enhanced data will also be erased OBD 2 MONITORS To ensure the correct operation of the various emissions related components and systems a diagnostic program was developed and installed in the vehicle s on board computer The program has several procedures and diagnostic strategies Each procedure or diagnostic strategy is made to monitor the operation of and run diagnostic tests on a specific emissions related component or system These tests ensure the system is running correctly and is within the manufacturer s specifications On OBD 2 systems these procedures and diagnostic strategies are called Monitors Currently a maximum of eleven Monitors are used in OBD 2 systems Additional monitors may be add
27. 06 Clutch Position Sensor Circuit Range Performance P0807 Clutch Position Sensor Circuit Low P0808 Clutch Position Sensor Circuit High P0809 Clutch Position Sensor Circuit Intermittent P0810 Clutch Position Control Error P0811 Excessive Clutch Slippage P0812 Reverse Input Circuit P0813 Reverse Output Circuit P0814 Transmission Range Display Circuit P0815 Upshift Switch Circuit P0816 Downshift Switch Circuit OBD2 65 DTC Definitions GENERIC P0817 P0849 Code Definition P0817 Starter Disable Circuit P0818 Driveline Disconnect Switch Input Circuit P0820 Gear Lever X Y Position Sensor Circuit P0821 Gear Lever X Position Circuit P0822 Gear Lever Y Position Circuit P0823 Gear Lever X Position Circuit Intermittent P0824 Gear Lever Y Position Circuit Intermittent P0825 Gear Lever Push Pull Switch Shift Anticipate P0830 Clutch Pedal Switch A Circuit P0831 Clutch Pedal Switch A Circuit Low P0832 Clutch Pedal Switch A Circuit High P0833 Clutch Pedal Switch B Circuit P0834 Clutch Pedal Switch B Circuit Low P0835 Clutch Pedal Switch B Circuit High P0836 Four Wheel Drive 4WD Switch Circuit P0837 Four Wheel Drive 4WD Switch Circuit Range Performance P0838 Four Wheel Drive 4WD Switch Circuit Low P0839 Four Wheel Drive 4WD Switch
28. 1 Ignition Control Circuit Open 1998 3 1L P1352 Bypass Circuit Open Or Voltage High P1359 Ignition Coil Group 1 Control Circuit P1360 Ignition Coil group 2 Control Circuit P1361 IC Circuit Not Toggling P1361 Ignition Control Circuit Voltage Low Distributor Ignition P1362 Bypass Circuit Shorted Or Voltage Low P1370 ICM 4X Reference Too Many Pulses P1371 ICM 4X Reference Too Few Pulses except Caprice Fleetwood Impala SS amp Roadmaster P1371 Distributor Ignition Low Resolution Circuit Caprice Fleetwood Impala SS amp Roadmaster P1372 CKP Sensor A B Correlation P1374 3X Reference Circuit P1375 ICM 24X Reference Voltage Too High P1376 Ignition Ground Circuit P1377 ICM Cam Pulse To 4X Reference Pulse Comparison P1380 ABS EBCM EB T CM DTC Detected Rough Road Data Unusable P1381 Misfire Detected No EBCM EB T CM PCM Serial Data P1401 Exhaust Gas Recirculation EGR flow test fault P1403 EGR Error P1404 EGR Valve Closed Pintle Position P1404 EGR Valve Stuck Open Or Circuit Performance P1405 EGR Error P1406 EGR Valve Pintle Position Circuit OBD2 85 DTC Definitions GENERAL MOTORS P1408 P1527 Code P1408 Definition MAP Sensor Circuit P1410 Fuel Tank Pressure System P1415 AIR System Bank 1 P1416 AIR System Bank 2 P1431 Fuel Level Sensor 2 Circuit Performance P1432 Fuel Lev
29. 10 Injector Circuit Malfunction Cylinder 10 P0211 Injector Circuit Malfunction Cylinder 11 P0212 Injector Circuit Malfunction Cylinder 12 P0213 Cold Start Injector 1 Malfunction P0214 Cold Start Injector 2 Malfunction P0215 Engine Shutoff Solenoid Malfunction P0216 Injection Timing Control Circuit Malfunction P0217 Engine Overtemp Condition P0218 Transmission Over Temperature Condition P0219 Engine Overspeed Condition P0220 Throttle Pedal Position Sensor Switch B Circuit Malfunction P0221 Throttle Pedal Position Sensor Switch B Circuit Range Performance Problem P0222 Throttle Pedal Position Sensor Switch B Circuit Low Input P0223 Throttle Pedal Position Sensor Switch B Circuit High Input P0224 Throttle Pedal Position Sensor Switch B Circuit Intermittent P0225 Throttle Pedal Position Sensor Switch C Circuit Malfunction P0226 Throttle Pedal Position Sensor Switch C Circuit Range Performance Problem P0227 Throttle Pedal Position Sensor Switch C Circuit Low Input P0228 Throttle Pedal Position Sensor Switch C Circuit High Input P0229 Throttle Pedal Position Sensor Switch C Circuit Intermittent P0230 Fuel Pump Primary Circuit Malfunction P0231 Fuel Pump Secondary Circuit Low P0232 Fuel Pump Secondary Circuit High P0233 Fuel Pump Secondary Circuit Intermittent P0234 Engine Overboost Condition P0235 Turbocharger Boost Sensor A Circuit Malfunction P0236 Turbocharger Boost Sensor A Circuit Range Performance
30. 1850 messages received P1682 Charging system voltage too low P1683 Speed control servo power control circuit P1684 The battery has been disconnected within the last 50 starts P1685 The SKIM Smart Key Immobilizer Module has received an invalid key P1686 No SKIM Smart Key Immobilizer Module bus message received P1687 No Mechanical Instrument cluster bus message P1688 Internal Fuel injection pump controller failure P1689 No communication between the ECM and injection pump module P1690 Fuel injection pump CKP sensor does not agree with the ECM CKP sensor P1691 Fuel injection pump controller calibration error P1692 Fault in companion Engine control module P1693 A companion DTC was set in both the ECM and PCM P1694 No CCD message from PCM Aisin transmission P1695 No CCD message from body control module P1696 PCM failure EEPROM write denied P1697 PCM Failure SRI Service Reminder Indicator mileage not stored P1698 No CCD message from TCM P1719 Skip shift solenoid circuit P1740 TCC solenoid or overdrive solenoid performance P1756 Governor pressure not equal to target at 15 20 psi P1757 Governor pressure is above 3 PSI when 0 PSI is requested P1762 Governor pressure sensor offset improper voltage P1763 Governor pressure sensor voltage to high P1764 Governor pressure sensor voltage to low P1765 Transmission 12 volt supply relay control circuit
31. 2S N P1167 Primary HO2S N Heater System P1168 Primary HO2S N LABEL Low Input P1169 Primary HO2S No 1 LABEL High Input P1253 VTEC System Malfunction P1257 VTEC System Malfunction P1258 VTEC System Malfunction P1259 VTEC System Malfunction P1297 Electrical Load Detector Circuit Low Input P1298 Electrical Load Detector Circuit High Input P1300 Multiple Cylinder Misfire Detected P1336 CSF Sensor Intermittent Interruption P1337 CSF Sensor No Signal P1359 CKP TDC Sensor Connector Disconnection P1361 TDC Sensor Intermittent Interruption P1362 TDC Sensor No Signal P1366 TDC Sensor No 2 Intermittent Interruption P1367 TDC Sensor No 2 Signal P1381 Cylinder Position Sensor Intermittent Interruption P1382 Cylinder Position Sensor No Signal Heater System Electrical 1 1 Circuit Range Performance 1 1 1 OBD 2 93 DTC Definitions HONDA P1456 P1687 Code P1456 Definition EVAP Emission Control System Leak Detected Fuel Tank System P1457 EVAP Emission Control System Leak Detected Control Canister System P1459 EVAP Emission Purge Flow Switch Malfunction P1491 EGR valve Lift Insufficient Detected P1498 EGR Valve Lift Sensor High Voltage P1508 IAC Valve Circuit Failure P1509 IAC Valve Circuit Failure P1519 Idle Air Control Valve Circuit Failure P1607 P1655 EGM PGM Internal Circuit
32. 41 Learning More e pM e Voce E m Air Conditioning A C Monitor The A C Monitor senses leaks in air conditioning systems that utilize R 12 refrigerant Vehicle manufacturers have been given two options 1 Use R 12 refrigerant in their A C systems and integrate an A C Monitor in the OBD 2 systems of these vehicles to detect for refrigerant leaks or 2 Use R 134 refrigerant instead of R12 The A C Monitor is not required on these vehicles To date all vehicle manufacturers have opted to use R 134 in their A C systems As a result this Monitor has not yet been implemented m Oxygen Sensor Heater Monitor The Oxygen Sensor Heater Monitor tests the operation of the oxygen sensor s heater There are two modes of operation on a computer controlled vehicle open loop and closed loop The vehicle operates in open loop when the engine is cold before it reaches normal operating temperature The vehicle also goes to open loop mode at other times such as heavy load and full throttle conditions When the vehicle is running in open loop the oxygen sensor signal is ignored by the computer for air fuel mixture corrections Engine efficiency during open loop operation is very low and results in the production of more vehicle emissions Closed loop operation is the best condition for both vehicle emissions and vehicle operation When the vehicle is operating in closed loop the computer uses the oxygen sensor signal for air
33. 665 EVAP Vent Valve Solenoid Control Circuit 1998 P1667 Reverse Inhibitor Solenoid Control Circuit 1996 97 P1667 Fuel Pump Speed Control Circuit 1998 P1670 QDM 4 Circuit P1671 MIL Control Circuit P1671 Oil Change Lamp Control Circuit P1672 Low Engine Oil Level Lamp Circuit P1673 Engine Hot Lamp Control Circuit P1674 Tachometer Control Circuit P1675 EVAP Vent Solenoid Control Circuit P1676 EVAP Canister Purge Solenoid Control CKT P1689 TCS Delivered Torque Control Circuit P1700 MIL Requested By TCM P1701 MIL Request Circuit P1740 Torque Management Request Circuits Transmission amp Traction Control Except Catera P1740 Torque Control Management Request Circuits Catera P1760 Transmission Control Module Supply Voltage Interrupted P1780 Park Neutral Position Switch Circuit P1781 Engine Torque Signal Circuit P1792 ECM To Transmission Control Module Engine Coolant Signal P1800 ECM To Transmission Control Module Engine Coolant Signal P1810 ATF Pressure Manual Valve Position Switch Malfunction P1811 Long Shift amp Max Adapt P1812 TOT Condition P1814 Torque Converter Overstress P1819 Internal Mode Switch No Start P1820 Internal Mode Switch Circuit A Low P1822 Internal Mode Switch Circuit B Low P1823 Internal Mode Switch Circuit P Low P1825 Internal Mode Switch Invalid Range OBD2 91 DTC Definitions GENE
34. 6L amp 1997 98 5 7L Corvette OBD 2 87 DTC Definitions GENERAL MOTORS P1571 P1610 Code P1571 Definition Traction Control System PWM Circuit No Frequency 4 0L amp 4 6L P1571 ASR Desired Torque 1997 98 5 7L Corvette P1572 Traction Control System Active Circuit Voltage Low Too Long P1573 PCM EBTOM Serial Data Circuit P1573 Engine Hot Lamp Control Circuit P1574 EBTCM System Stop Lamp Circuit Voltage High except 1997 98 Corvette P1574 Stop Lamp Control Circuit 1997 98 Corvette P1575 Extended Travel Brake Switch Circuit Voltage High P1576 Brake Booster Vacuum Sensor Circuit Voltage High P1577 Brake Booster Vacuum Sensor Circuit Voltage Low P1578 Brake Booster Vacuum Sensor Circuit Low Vacuum P1579 Park Neutral To Drive Reverse At High Throttle Angle P1580 Cruise Control Module Move Circuit Low Voltage P1581 P1582 Cruise Control Module Move Circuit High Voltage Cruise Control Module Direction Circuit Low Voltage P1583 Cruise Control Module Direction Circuit High Voltage P1584 Cruise Control Disabled P1585 Cruise Control Inhibit Output Circuit P1586 Cruise Control Brake Switch 2 Circuit P1599 Engine Stall Or Near Stall Detected P1600 PCM Battery P1600 Serial Communication Between PCM am
35. AY FUNCTIONS LCD Display Displays test results Code Reader functions and Monitor status information See DISPLAY FUNCTIONS below for details Cable Connects Code Reader to the vehicle s Data Link Connector DLC USB Connector Used to connect USB cable when transferring data batween Code Reader and personal computer DISPLAY FUNCTIONS Se 1 OBD 2 11 9 10 7 i a I M E mx e co Y cop 8 3 00 SOO ae ue zu Orn iM POON Figure 2 Display Functions e Figure 2 for the locations of items 1 through 13 below amp Vehicle icon Indicates whether or not Code Reader is being properly powered through the vehicle s Data Link Connector DLC A visible icon indicates that Code Reader is being powered through the vehicle s DLC connector QD Link icon Indicates whether or not Code Reader is com municating linked with the vehicle s on board computer When visible Code Reader is communicating with the computer If the Link icon is not visible Code Reader is not communicating with the computer Q Computer icon When visible indicates the Code Reader is connected to a ppersonal computer to upload or download data PC Link is an optional accessory Internal Battery icon When visible indicates the Code Reader batteries are low and should be replaced DTC Display Area Displays the Diagnostic Trouble Code DTC number Each fault is assigned a code number that is specific
36. Bank 2 Sensor 2 P0159 O2 Sensor Circuit Slow Response Bank 2 Sensor 2 P0160 O2 Sensor Circuit No Activity Detected Bank 2 Sensor 2 P0161 O2 Sensor Heater Circuit Malfunction Bank 2 Sensor 2 P0162 O2 Sensor Circuit Malfunction Bank 2 Sensor 3 P0163 O2 Sensor Circuit Low Voltage Bank 2 Sensor 3 P0164 O2 Sensor Circuit High Voltage Bank 2 Sensor 3 P0165 O2 Sensor Circuit Slow Response Bank 2 Sensor 3 P0166 O2 Sensor Circuit No Activity Detected Bank 2 Sensor 3 P0167 O2 Sensor Heater Circuit Malfunction Bank 2 Sensor 3 P0168 Fuel Temperature Too High P0169 Incorrect Fuel Composition P0170 Fuel Trim Malfunction Bank 1 OBD 2 49 DTC Definitions GENERIC P0171 P0204 Code Definition P0171 System too Lean Bank 1 P0172 System too Rich Bank 1 P0173 Fuel Trim Malfunction Bank 2 P0174 System too Lean Bank 2 P0175 System too Rich Bank 2 P0176 Fuel Composition Sensor Circuit Malfunction P0177 Fuel Composition Sensor Circuit Range Performance P0178 Fuel Composition Sensor Circuit Low Input P0179 Fuel Composition Sensor Circuit High Input P0180 Fuel Temperature Sensor A Circuit Malfunction P0181 Fuel Temperature Sensor A Circuit Range Performance P0182 Fuel Temperature Sensor A Circuit Low Input P0183 Fuel Temperature Sensor A
37. Change P1464 A C Demand Out Of Self Test Range P1465 A C Relay Circuit P1466 A C Refrigerant Temperature Sensor Circuit P1469 Rapid A C Cycling 76 OBD2 DTC Definitions FORD P1473 P1566 Code Definition P1473 Fan Circuit Open VLCM P1474 Fan Control Primary Circuit P1479 High Fan Control Primary Circuit P1480 Fan Secondary Low With Low Fan On P1481 Fan Secondary Low With High Fan On P1482 SCP P1483 Brake Pedal Input Short To Battery P1484 Fan Driver Circuit Open To Power Ground VLCM P1485 Brake Pedal Input Short To Battery P1500 Vehicle Speed Sensor P1501 Vehicle Speed Sensor Out Of Self Test Range P1502 Vehicle Speed Sensor Intermittent P1504 Idle Air Control Circuit P1505 Idle Air Control System At Adaptive Clip P1506 Idle Air Control Overspeed Error P1507 Idle Air Control Underspeed Error P1512 Intake Manifold Runner Control Stuck Closed Bank 1 P1513 Intake Manifold Runner Control Stuck Closed Bank 2 P1516 Intake Manifold Runner Control Input Error Bank 1 P1517 Intake Manifold Runner Control Input Error Bank 2 P1518 Intake Manifold Runner Control Stuck Open Bank 1 P1519 Intake Manifold Runner Control Stuck Closed Bank 2 P1520 Intake Manifold Runner Control Circuit P1530 A C Clutch Circuit Open VLCM P1532 Intake Manifold Communication Control Circuit Bank 2 P1533 Air Assisted Injector Circuit P1534 Restraint Deployment Indicator Circuit P1537 Intake Manifold Runner Control
38. Circuit High P0840 Transmission Fluid Pressure Sensor Switch A Circuit P0841 Transmission Fluid Pressure Sensor Switch A Circuit Range Performance P0842 Transmission Fluid Pressure Sensor Switch A Circuit Low P0843 Transmission Fluid Pressure Sensor Switch A Circuit High P0844 Transmission Fluid Pressure Sensor Switch A Circuit Intermittent P0845 Transmission Fluid Pressure Sensor Switch B Circuit P0846 Transmission Fluid Pressure Sensor Switch B Circuit Range Performance P0847 Transmission Fluid Pressure Sensor Switch B Circuit Low P0848 Transmission Fluid Pressure Sensor Switch B Circuit High P0849 Transmission Fluid Pressure Sensor Switch B Circuit Intermittent 66 OBD2 DTC Definitions CHRYSLER P1103 P1389 MANUFACTURER SPECIFIC CODES CHRYSLER Code Definition P1103 Turbocharger Waste Gate Actuator Malfunction P1104 Turbocharger Waste Gate Solenoid Malfunction P1105 Fuel Pressure Solenoid Malfunction P1195 Slow Switching O2 Sensor Bank One Sensor One During catalyst monitoring P1196 Slow Switching O2 Sensor Bank two Sensor one During catalyst monitoring P1197 Slow Switching O2 Sensor Bank One Sensor two During catalyst monitoring P1198 Radiator Temperature Sensor Input voltage too high P1199 Radiator Temperature Sensor Input voltage too low P1281 Engine is cold too long P1282 Fuel Pump Relay control circuit P1283 Idle select signal invalid
39. Circuit High Input P0074 Ambient Air Temperature Sensor Circuit Intermittent P0075 Intake Valve Control Solenoid Circuit Bank 1 P0076 Intake Valve Control Solenoid Circuit Low Bank 1 P0077 Intake Valve Control Solenoid Circuit High Bank 1 P0078 Exhaust Valve Control Solenoid Circuit Bank 1 P0079 Exhaust Valve Control Solenoid Circuit Low Bank 1 P0080 Exhaust Valve Control Solenoid Circuit High Bank 1 P0081 Intake Valve Control Solenoid Circuit Bank 2 P0082 Intake Valve Control Solenoid Circuit Low Bank 2 P0083 Intake Valve Control Solenoid Circuit High Bank 2 P0084 Exhaust Valve Control Solenoid Circuit Bank 2 P0085 Exhaust Valve Control Solenoid Circuit Low Bank 2 P0086 Exhaust Valve Control Solenoid Circuit High Bank 2 P0100 Mass or Volume Air Flow Circuit Malfunction P0101 Mass or Volume Circuit Range Performance Problem P0102 Mass or Volume Circuit Low Input P0103 Mass or Volume Circuit High Input P0104 Mass or Volume Circuit Intermittent P0105 Manifold Absolute Pressure Barometric Pressure Circuit Malfunction P0106 Manifold Absolute Pressure Barometric Pressure Circuit Range Performance Problem OBD2 47 DTC Definitions GENERIC P0107 P0136 Code Definition P0107 Manifold Absolute Pressure Barometric Pressure Circuit Low Input P0108 Manifold Absolute Pressure B
40. Circuit Low P0265 Cylinder 2 Injector Circuit High P0266 Oylinder 2 Contribution Balance Fault P0267 Oylinder 3 Injector Circuit Low P0268 Cylinder 3 Injector Circuit High P0269 Oylinder 3 Contribution Balance Fault P0270 Oylinder 4 Injector Circuit Low 52 OBD2 Code P0271 DTC Definitions Definition Cylinder 4 Injector Circuit High GENERIC P0271 P0306 P0272 Cylinder 4 Contribution Balance Fault P0273 Cylinder 5 Injector Circuit Low P0274 Cylinder 5 Injector Circuit High P0275 Cylinder 5 Contribution Balance Fault P0276 Cylinder 6 Injector Circuit Low P0277 Cylinder 6 Injector Circuit High P0278 Cylinder 6 Contribution Balance Fault P0279 P0280 Cylinder 7 Injector Circuit Low Cylinder 7 Injector Circuit High P0281 Cylinder 7 Contribution Balance Fault P0282 Cylinder 8 Injector Circuit Low P0283 Cylinder 8 Injector Circuit High P0284 Cylinder 8 Contribution Balance Fault P0285 Cylinder 9 Injector Circuit Low P0286 Cylinder 9 Injector Circuit High P0287 Cylinder 9 Contribution Balance Fault P0288 Cylinder 10 Injector Circuit Low P0289 P0290 Cylinder 10 Injector Circuit High Cylinder 10 Contribution Balance Fault P0291 Cylinder 11 Injector Circuit Low P0292 Cylinder 11 Injector Circuit High P0293 Cylinder 11 Contribution Balance Fault P0294 Cy
41. Control Solenoid Malfunction P0746 Pressure Control Solenoid Performance or Stuck Off OBD2 63 DTC Definitions GENERIC P0747 P0780 Code P0747 Definition Pressure Control Solenoid Stuck On P0748 Pressure Control Solenoid Electrical P0749 Pressure Control Solenoid Intermittent P0750 Shift Solenoid A Malfunction P0751 Shift Solenoid A Performance or Stuck Off P0752 Shift Solenoid A Stuck On P0753 Shift Solenoid A Electrical P0754 Shift Solenoid A Intermittent P0755 P0756 Shift Solenoid B Malfunction Shift Solenoid B Performance or Stuck Off P0757 Shift Solenoid B Stuck On P0758 Shift Solenoid B Electrical P0759 Shift Solenoid B Intermittent P0760 Shift Solenoid C Malfunction P0761 Shift Solenoid C Performance or Stuck Off P0762 Shift Solenoid C Stuck On P0763 Shift Solenoid C Electrical P0764 Shift Solenoid C Intermittent P0765 P0766 Shift Solenoid D Malfunction Shift Solenoid D Performance or Stuck Off P0767 Shift Solenoid D Stuck On P0768 Shift Solenoid D Electrical P0769 Shift Solenoid D Intermittent P0770 Shift Solenoid E Malfunction P0771 Shift Solenoid E Performance or Stuck Off P0772 Shift Solenoid E Stuck On P0773 Shift Solenoid E Electrical P0774 Shift Solenoid E
42. DIGITAL CC OBD2 CODE READER OWNER S MANUAL The Easiest And Best Way To Troubleshoot 1996 and Newer OBD Il Vehicles Table of Contents Title Page No INTRODUCTION Congratulations vesc sie p eer bebra ES euren pr das 1 Whatis OBD osse emer dates n EEUU ds 2 YOU CAN DO IT iill lll ile em mre eme rae iI 3 SAFETY PRECAUTIONS Safety First cce ssepe PETI Red ERG ER dere d 4 ABOUT THE CODE READER Vehicles Covered 0 cece eect nee 6 Battery Replacement 0 00 0 eee eee eee 7 Controls and Indicators lisse 8 Display Functions 2 ss eee 9 PREPARATION FOR TESTING Before You Begin sseeeeeee teen nn 12 Vehicle Service Manuals slsleeleeeeeess 13 Preliminary Vehicle Diagnosis Worksheet 14 USING THE CODE READER Code Retrieval Procedure 0c cee eee eee eee 17 Erasing Diagnostic Trouble Codes DTCs 20 I M Readiness Testing leslie 21 What s Next road trip readiness emissions test 27 readiness inspecting a used vehicle LEARNING MORE Computer Engine Controls 0 00 e eee eee eee 29 Diagnostic Trouble Codes DTCs 0000 0 eee 35 OBD 2 Monitors ai veo Sir tee PR ates WERE ERE 38 DTC DEFINITIONS Diagnostic Trouble Code Definitions isse 45 Generic DTC Definitions lslsesls lesse 46 Manufacturer Specific Codes Ch
43. Federal and state country governments where you live 1 In most areas one of the requirements that must be met before a vehicle is allowed to be Emissions Tested Smog Checked is that the vehicle does not have any Diagnostic Trouble Codes present with the exception of PENDING Diagnostic Trouble Codes 2 In addition to the requirement that no Diagnostic Trouble Codes be present some areas also require that all the Monitors that a particular vehicle supports indicate a Has Run status condition before an Emissions Check may be performed 3 Other areas may only require that some but not all Monitors indicate a Has Run status before an Emissions Test Smog Check may be performed Monitors with a Has Run status indicate that all the required conditions they needed to perform diagnosis and testing of their assigned engine area system have been met and all diagnostic testing has completed successtully Monitors with a Has Not Run status have not yet met the conditions they need to perform diagnosis and testing of their assigned engine area system and have not been able to perform diagnostic testing on that system The green yellow and red LEDs provide a quick way to help you determine if a vehicle is ready for an Emissions Test Smog Check Follow the instructions below to perform the Quick Check Perform the Code Retrieval Procedure as described on page 17 then interpret the LED indications as follows Interpr
44. Feedback EGR Circuit High Input P1402 Exhaust Gas Recirculation Metering Orifice Restricted P1403 Differential Pressure Feedback Sensor Hoses Reversed P1404 EGR Temperature Sensor Circuit P1405 Differential Pressure Feedback Sensor Upstream Hose Off Or Plugged P1406 Differential Pressure Feedback Sensor Downstream Hose Off Or Plugged P1407 Exhaust Gas Recirculation No Flow Detected P1408 Exhaust Gas Recirculation Flow Out Of Self Test Range P1409 EGR Vacuum Regulator Solenoid Circuit P1410 Auxiliary Air Cleaner Inlet Control Circuit P1411 Secondary Air Injection Incorrect Downstream Flow Detected P1413 Secondary Air Injection Monitor Circuit Low Input P1414 Secondary Air Injection Monitor Circuit High Input P1431 Misfire Monitor Disabled Unable to Learn Trigger Wheel Profile P1442 Evaporative Emission Control System Control Leak Detected P1443 Evaporative Emission Control System Control Valve P1444 Purge Flow Sensor Circuit Low Input P1445 Purge Flow Sensor Circuit High Input P1450 Unable to Bleed Up Fuel Tank Vacuum P1451 Evaporative Emission Control System Vent Control Circuit P1452 Unable to Bleed Up Fuel Tank Vacuum P1455 Evaporative Emission Control System Control Leak Detected gross leak no flow P1457 Unable to Pull Fuel Tank Vacuum P1460 Wide Open Throttle A C Cutout Circuit P1461 A C Pressure Sensor Circuit High Input P1462 A C Pressure Sensor Circuit Low Input P1463 A C Pressure Sensor Insufficient Pressure
45. Intermittent P0775 P0776 Pressure Control Solenoid B Pressure Control Solenoid B Performance or Stuck Off P0777 Pressure Control Solenoid B Stuck On P0778 Pressure Control Solenoid B Electrical P0779 Pressure Control Solenoid B Intermittent P0780 Shift Malfunction 64 OBD2 DTC Definitions GENERIC P0781 P0816 Code Definition P0781 1 2 Shift Malfunction P0782 2 3 Shift Malfunction P0783 3 4 Shift Malfunction P0784 4 5 Shift Malfunction P0785 Shift Timing Solenoid Malfunction P0786 Shift Timing Solenoid Range Performance P0787 Shift Timing Solenoid Low P0788 Shift Timing Solenoid High P0789 Shift Timing Solenoid Intermittent P0790 Normal Performance Switch Circuit Malfunction P0791 Intermediate Shaft Speed Sensor Circuit P0792 Intermediate Shaft Speed Sensor Circuit Range Performance P0793 Intermediate Shaft Speed Sensor Circuit No Signal P0794 Intermediate Shaft Speed Sensor Circuit Intermittent P0795 Pressure Control Solenoid C P0796 Pressure Control Solenoid C Performance or Stuck Off P0797 Pressure Control Solenoid C Stuck On P0798 Pressure Control Solenoid C Electrical P0799 Pressure Control Solenoid C Intermittent P0801 Reverse Inhibit Control Circuit Malfunction P0803 1 4 Upshift Skip Shift Solenoid Control Circuit Malfunction P0804 1 4 Upshift Skip Shift Lamp Control Circuit Malfunction P0805 Clutch Position Sensor Circuit P08
46. Level Lamp Circuit Short To Ground P1891 Transfer Case Contact Plate Ground Return Open Circuit P1900 Output Shaft Speed Sensor Circuit Intermittent P1901 Turbine Shaft Speed Sensor Circuit Intermittent 82 OBD2 DTC Definitions GENERAL MOTORS P1031 P1188 MANUFACTURER SPECIFIC CODES GENERAL MOTORS Code Definition P1031 H02 Sensor Heater Control Circuit Problem P1106 MAP Sensor Circuit Intermittent High or Low Voltage P1107 MAP Sensor Circuit Intermittent Voltage Low P1108 BARO to MAP Signal Circuit Comparison Too High P1111 IAT Sensor Circuit Intermittent Voltage High P1112 IAT Sensor Circuit Intermittent Voltage Low except Catera P1112 Intake Plenum Switchover Valve Control Catera P1113 Intake Resonance Switchover Valve Control P1114 ECT Sensor Circuit Intermittent Voltage Low P1115 ECT Sensor Circuit Intermittent Voltage High P1120 Throttle Positioning Sensor 1 Circuit P1121 Throttle Positioning Sensor 1 2 Circuit Performance Fuel Injector Secondary System Circuit Low P1122 TPS Circuit Intermittent Voltage Low P1125 APP System P1133 HO2S O2S Insufficient Switching Sensor 1 Or Bank 1 Sensor 1 P1134 HO2S Transition Time Ratio Bank 1 Sensor 1 P1137 HO2 Sensor Low Voltage During Power Enrichment P1138 HO2 Sensor High Voltage During Decel Fuel Cutoff P1139 HO2S Insufficient Switching Bank 1 Sensor 2 P1140 HO2S Transition Time Ratio Bank 1 Sensor 2 P1141
47. ONS To learn more about Monitors what they do and how they work see OBD 2 MONITORS on page 38 A maximum of eleven Monitors are used on OBD 2 systems Not all vehicles support all eleven Monitors When Code Reader is linked to a vehicle only the icons for Monitors that are supported by the vehicle under test are visible on the display Following is a list of Monitor icons and their associated Monitors Misfire Monitor o Fuel System Monitor Comprehensive Component Monitor Catalyst Monitor Heated Catalyst Monitor Evaporative System Monitor Secondary Air System Monitor Air Conditioning System Refrigerant R 12 Monitor Oxygen Sensor Monitor Oxygen Sensor Heater Monitor o0600000090 Exhaust Gas Recirculation EGR Monitor OBD 2 11 Preparation for Testing BEFORE YOU BEGIN BEFORE YOU BEGIN OBD 2 Code Reader aids in monitoring electronic and emissions related faults in your vehicle and retrieving fault codes related to malfunctions in these systems Mechanical problems such as low oil level or damaged hoses wiring or electrical connectors can cause poor engine performance and may also cause a false fault code Fix any known mechanical problems before performing any test See your vehicle s service manual or a mechanic for more information Check the following areas before starting any test m Check the engine oil power steering fluid transmission fluid if applicabl
48. P0403 Exhaust Gas Recirculation Circuit Malfunction P0404 Exhaust Gas Recirculation Circuit Range Performance P0405 Exhaust Gas Recirculation Sensor A Circuit Low P0406 Exhaust Gas Recirculation Sensor A Circuit High P0407 Exhaust Gas Recirculation Sensor B Circuit Low P0408 Exhaust Gas Recirculation Sensor B Circuit High P0409 Exhaust Gas Recirculation Sensor A Circuit P0410 Secondary Air Injection System Malfunction P0411 Secondary Air Injection System Incorrect Flow Detected P0412 Secondary Air Injection System Switching Valve A Circuit Malfunction P0413 Secondary Air Injection System Switching Valve A Circuit Open P0414 Secondary Air Injection System Switching Valve A Circuit Shorted P0415 Secondary Air Injection System Switching Valve B Circuit Malfunction 56 OBD2 DTC Definitions GENERIC P0416 P0445 Code Definition P0416 Secondary Air Injection System Switching Valve B Circuit Open P0417 Secondary Air Injection System Switching Valve B Circuit Shorted P0418 Secondary Air Injection System Relay A Circuit Malfunction P0419 Secondary Air Injection System Relay B Circuit Malfunction P0420 Catalyst System Efficiency Below Threshold Bank 1 P0421 Warm Up Catalyst Efficiency Below Threshold Bank 1 P0422 Main Catalyst Efficiency Below Threshold Bank 1 P0423 Heated Catalyst Efficiency Below Threshold Bank 1 P0424 Heated Catalyst Temperature Below Threshold Bank 1 P0425 Catalyst Temperature Sen
49. RAL MOTORS P1826 P1895 Code P1826 Definition Internal Mode Switch Invalid Range P1835 Kickdown Switch Circuit P1842 1 2 Shift Solenoid Circuit Low Input P1843 1 2 Shift Solenoid Circuit High Input P1845 2 3 Shift Solenoid Circuit Low Input P1847 2 3 Shift Solenoid Circuit High Input P1850 Brake Band Apply Solenoid P1860 TCC PWM Solenoid Circuit P1864 P1868 TCC Enable Solenoid Circuit Transmission Fluid Life P1870 Trans Component Slipping P1875 4WD Low Switch Circuit Electrical P1886 Transaxle Shift Timing Solenoid Performance P1887 TCC Release Switch Malfunction P1890 Throttle Position Signal Input P1895 Engine Torque Delivered Circuit 92 OBD 2 DTC Definitions HONDA P1106 P1382 MANUFACTURER SPECIFIC CODES HONDA Code Definition P1106 BARO Circuit Range Performance P1107 BARO Circuit Low Input P1108 BARO Circuit High Input P1121 Throttle Position Lower Than Expected P1122 Throttle Position Higher Than Expected P1128 MAP Lower Than Expected P1129 MAP Higher Than Expected P1149 Primary HO2S Sensor 1 Circuit Range Performance Problem P1162 Primary HO2S No P1163 Primary HO2S No P1164 Primary HO2S No P1165 Primary HO2S No No No No 1 Circuit Malfunction 1 Circuit Slow Response Circuit Range Performance P1166 Primary HO
50. Stuck Open Bank 1 P1538 Intake Manifold Runner Control Stuck Open Bank 2 P1539 A C Clutch Circuit Overcurrent Short VLCM P1549 Intake Manifold Communication Control Circuit Bank 1 P1550 Power Steering Pressure Sensor Out Of Self Test Range P1565 Speed Control Command Switch Out Of Range High P1566 Speed Control Command Switch Out Of Range Low OBD2 77 DTC Definitions FORD P1567 P1625 Code Definition P1567 Speed Control Output Circuit P1568 Speed Control Unable To Hold Speed P1572 Brake Pedal Switch Circuit P1573 Throttle Position Not Available P1574 Throttle Position Sensor Outputs Disagree P1575 Pedal Position Out Of Self Test Range P1576 Pedal Position Not Available P1577 Pedal Position Sensor Outputs Disagree P1578 ETC Power Less Than Demand P1579 ETC In Power Limiting Mode P1580 Electronic Throttle Monitor PCM Override P1581 Electronic Throttle Monitor Malfunction P1582 Electronic Throttle Monitor Data Available P1583 Electronic Throttle Monitor Cruise Disablement P1584 Throttle Control Detected ETB Malfunction P1585 Throttle Control Malfunction P1586 Electronic Throttle To PCM Communication Error P1587 Throttle Control Modulated Command Malfunction P1588 Throttle Control Detected Loss Of Return Spring P1589 Throttle Control Unable To Control To Desired Throttle Angle P1605 Keep Alive Memory Test Failure P1610
51. System Vent Control Circuit Malfunction P0447 Evaporative Emission Control System Vent Control Open P0448 Evaporative Emission Control System Vent Control Circuit Shorted P0449 Evaporative Emission Control System Vent Valve Solenoid Circuit Malfunction P0450 Evaporative Emission Control System Pressure Sensor Malfunction P0451 Evaporative Emission Control System Pressure Sensor Range Performance P0452 Evaporative Emission Control System Pressure Sensor Low Input P0453 Evaporative Emission Control System Pressure Sensor High Input P0454 Evaporative Emission Control System Pressure Sensor Intermittent P0455 Evaporative Emission Control System Leak Detected gross leak P0456 Evaporative Emission Control System Leak Detected very small leak P0457 Evaporative Emission Control System Leak Detected fuel cap loose off P0460 Fuel Level Sensor Circuit Malfunction P0461 Fuel Level Sensor Circuit Range Performance P0462 Fuel Level Sensor Circuit Low Input P0463 Fuel Level Sensor Circuit High Input P0464 Fuel Level Sensor Circuit Intermittent P0465 Purge Flow Sensor Circuit Malfunction P0466 Purge Flow Sensor Circuit Range Performance P0467 Purge Flow Sensor Circuit Low Input P0468 Purge Flow Sensor Circuit High Input P0469 Purge Flow Sensor Circuit Intermittent P0470 Exhaust Pressure Sensor Malfunction P0471 Exhaust Pressure Sensor Range Performance P0472 Exhaust Pressure Sensor Low P0473 Exhaust Pressure Sensor High
52. Upstream HO2S Sensors Swapped P1129 Downstream HO2S Sensors Swapped P1130 Lack Of HO2S11 Switches Fuel Trim At Limit P1131 Lack Of HO2S11 Switches Sensor Indicates Lean P1132 Lack Of HO2S11 Switches Sensor Indicates Rich P1133 Bank 1 Fuel Control Shifted Lean FAOSC 70 OBD2 DTC Definitions FORD P1134 P1187 Code Definition P1134 Bank 1 Fuel Control Shifted Rich FAOSC P1135 Pedal Position Sensor A Circuit Intermittent P1137 Lack of HO2S12 Switches Sensor Indicates Lean P1138 Lack of HO2S12 Switches Sensor Indicates Rich P1139 Water in Fuel Indicator Circuit P1140 Water in Fuel Condition P1141 Fuel Restriction Indicator Circuit P1142 Fuel Restriction Condition P1150 Lack of HO2S21 Switches Fuel Trim At Limit P1151 Lack of HO2S21 Switches Sensor Indicates Lean P1152 Lack of HO2S21 Switches Sensor Indicates Rich P1153 Bank 2 Fuel Control Shifted Lean FAOSC P1154 Bank 2 Fuel Control Shifted Rich FAOSC P1155 Alternative Fuel Control Module Has Activated the MIL P1157 Lack of HO2S22 Switches Sensor Indicates Lean P1158 Lack of HO2S22 Switches Sensor Indicates Rich P1168 Fuel Rail Pressure Sensor In Range But Low P1169 Fuel Rail Pressure Sensor In Range But High P1170 Engine Shut Off Solenoid P1171 Rotor Sensor P1172 Rotor Control P1173 Rotor Calibration P1174 Cam Sensor P1175 Cam Control P1176 Cam C
53. VCM in Learn Mode P1631 Theft Deterrent System Password Improper P1632 Theft Deterrent System Fuel Disabled P1633 Ignition Supplemental Power Circuit Voltage Low P1634 Ignition 1 Power Circuit Voltage Low P1635 5 Volt Reference A Or 1 Circuit P1637 Alternator L Terminal Circuit P1638 Alternator F Terminal Circuit P1639 5 Volt Reference B Or 2 Circuit P1640 Driver 1 Input Voltage High P1641 MIL Control Circuit Except 5 7L VINs P amp 5 amp 1998 3 1L amp 3 8L P1641 Fan Control Relay 1 Control Circuit 5 7L VINs P amp 5 P1641 A C Relay Control Circuit 1998 3 1L amp 3 8L P1642 Vehicle Speed Output Circuit Except 3 4L 5 7L VINSP amp 5 amp 1998 3 8L P1642 Fan Control Relay 2 amp 3 Control Circuit 5 7L VINs P amp 5 OBD2 89 DTC Definitions GENERAL MOTORS P1642 P1663 Code P1642 Definition AIR Control Circuit 3 4L P1642 Change Oil Lamp Control Circuit 1998 3 1L Lumina amp Monte Carlo P1643 Fuel Pump PWM Control Circuit Except 5 7L VINs P amp 5 P1643 P1644 Engine RPM Output Circuit 5 7L VINs P amp 5 Delivered Torque Output Circuit P1645 Boost Control Solenoid Circuit Except 4 0L amp 4 6L P1645 EVAP Solenoid Output Circuit 4 0L amp 4 6L P1646 Boost Control Solenoid Control Circuit Except 4 0L amp 4 6L P1646 EVAP Vent Valve Outp
54. While observing the Monitor icons on Code Reader s LCD display perform a Trip Drive Cycle for the appropriate Monitor or Monitors If the vehicle needs to be driven in order to perform a Trip Drive Cycle ALWAYS have a second person help you One person should drive the vehicle while the other person observes the Monitor icons on Code Reader for Monitor RUN status Trying to drive and observe Code Reader at the same time is dangerous and could cause a serious traffic accident 26 OBD2 4 Using Code Reader WHAT S NEXT When a Monitor s Trip Drive Cycle is performed properly the Monitor icon on Code Reader s LCD display changes from flashing to solid indicating that the Monitor has run and finished its diagnostic testing m f after the Monitor has run the MIL on the vehicle s dash is not lit and no codes associated with that particular Monitor are present in the vehicle s computer the repair was successful m f after the Monitor has run the MIL on the vehicle s dash lights and or a DTC associated with that Monitor is present in the vehicle s computer the repair was unsuccessful Refer to the vehicle s service manual and recheck repair procedures WHAT S NEXT Us e the green yellow and red LEDs as a quick check of the status of a vehicle s engine control and emissions systems When checking your vehicle for road trip readiness A GREEN LED indicates that all engine systems are OK and operati
55. alibration P1177 Synchronization P1178 Boltup Limits P1180 Fuel Delivery System Low P1181 Fuel Delivery System High P1183 Engine Oil Temperature Sensor Circuit P1184 Engine Oil Temperature Sensor Out Of Self Test Range P1185 Fuel Pump Temperature Sensor High P1186 Fuel Pump Temperature Sensor Low P1187 Variant Selection OBD2 71 DTC Definitions FORD P1188 P1232 Code P1188 Definition Calibration Memory P1189 Pump Speed Signal P1190 Calibration Resistor Out Of Range P1191 Key Line Voltage P1192 V External P1193 EGR Driver Over Current P1194 ECM PCM A D Converter P1195 SCP HBCC Chip Failed to Initialize P1196 P1197 Key Off Voltage High Key Off Voltage Low P1198 Pump Rotor Control Underfueling P1209 Injector Control Pressure Peak Delta Test Fault P1210 Injector Control Pressure Above Expected Level P1211 Injector Control Pressure Above Below Desired P1212 Injector Control Pressure Not At Expected Level P1214 Pedal Position Sensor B Circuit Intermittent P1215 Pedal Position Sensor C Circuit Low Input P1216 Pedal Position Sensor C Circuit High Input P1217 P1218 Pedal Position Sensor C Circuit Intermittent CID High P1219 CID Low P1220 Series Throttle Control System P1221 Traction Control System P1222 Pe
56. and Cruiser 2000 Celica amp Tundra P1315 Igniter Circuit Malfunction No 4 1998 2000 Land Cruiser 2000 Celica amp Tundra P1320 Igniter Circuit Malfunction No 5 1998 2000 Land Cruiser amp 2000 Tundra P1325 Igniter Circuit Malfunction No 6 1998 2000 Land Cruiser amp 2000 Tundra P1330 Igniter Circuit Malfunction No 7 1998 2000 Land Cruiser amp 2000 Tundra P1335 No CKP Sensor Signal Engine Running P1340 Igniter Circuit Malfunction No 8 1998 2000 Land Cruiser amp 2000 Tundra P1346 VVT Sensor Camshaft Position Sensor Circuit Range Performance Problem Bank 1 OBD 2 95 DTC Definitions TOYOTA P1349 P1780 Code P1349 Definition VVT System Malfunction P1400 Sub Throttle Position Sensor Malfunction P1401 Sub Throttle Position Sensor Range Performance Problem P1405 Turbo Pressure Sensor Circuit Malfunction P1406 Turbo Pressure Sensor Range Performance Problem P1410 EGR Valve Position Sensor Circuit Malfunction P1411 EGR Valve Position Sensor Circuit Ranger Performance P1500 Starter Signal Circuit Malfunction P1510 P1511 Boost Pressure Control Circuit Malfunction Boost Pressure Low Malfunction P1512 Boost Pressure High Malfunction P1520 Stop Lamp Switch Signal Malfunction P1565 Cruise Control Main Switch Circuit Malfunction P1600 ECM BATT Malfunction
57. arometric Pressure Circuit High Input P0109 Manifold Absolute Pressure Barometric Pressure Circuit Intermittent P0110 Intake Air Temperature Circuit Malfunction P0111 Intake Air Temperature Circuit Range Performance Problem P0112 Intake Air Temperature Circuit Low Input P0113 Intake Air Temperature Circuit High Input P0114 Intake Air Temperature Circuit Intermittent P0115 Engine Coolant Temperature Circuit Malfunction P0116 Engine Coolant Temperature Circuit Range Performance Problem P0117 Engine Coolant Temperature Circuit Low Input P0118 Engine Coolant Temperature Circuit High Input P0119 Engine Coolant Temperature Circuit Intermittent P0120 Throttle Pedal Position Sensor Switch A Circuit Malfunction P0121 Throttle Pedal Position Sensor Switch A Circuit Range Performance Problem P0122 Throttle Pedal Position Sensor Switch A Circuit Low Input P0123 Throttle Pedal Position Sensor Switch A Circuit High Input P0124 Throttle Pedal Position Sensor Switch A Circuit Intermittent P0125 Insufficient Coolant Temperature for Closed Loop Fuel Control P0126 Insufficient Coolant Temperature for Stable Operation P0127 Intake Air Temperature Too High P0128 Coolant Thermostat Coolant Temperature Below Thermostat Regulating Temperature P0130 O2 Sensor Circuit Malfunction Bank 1 Sensor 1 P0131 O2 Sensor Circuit Low Voltage Bank 1 Sensor 1 P0132 O2 Sensor Circuit High Voltage Bank 1 Sensor 1 P0133 O2 Sensor Circuit Slow Respo
58. ber found at the base of the windshield on a metallic plate or at the driver door latch area consult your vehicle owner s manual for location TRANSMISSION C Automatic C Manual Please check all applicable items in each category DESCRIBE THE PROBLEM 14 OBD2 Preparation for Testing PRELIMINARY VEHICLE DIAGNOSIS WORKSHEET WHEN DID YOU FIRST NOTICE THE PROBLEM C Just Started C Started Last Week C Started Last Month 0 Other LIST ANY REPAIRS DONE IN THE PAST SIX MONTHS PROBLEMS STARTING Q No symptoms C Will not crank ENGINE QUITS OR STALLS C No symptoms Q Right after starting Q When shifting into gear C During steady speed driving IDLING CONDITIONS Q No symptoms C Is too slow at all times C Is too fast RUNNING CONDITIONS Q No symptoms Runs rough Lacks power Bucks and jerks Poor fuel economy Ooooo Hesitates or stumbles on accelerations OBD 2 D Ooeovo Ooo Ooooo Cranks but will not start Starts but takes a long time Right after vehicle comes to a stop While idling During acceleration When parking Is sometimes too fast or too slow Is rough or uneven Fluctuates up and down Backfires Misfires or cuts out Engine knocks pings or rattles Surges Dieseling or run on 15 Preparation for Testing PRELIMINARY VEHICLE
59. ce High Resolution Signal A No Pulses P0375 Timing Reference High Resolution Signal B Malfunction P0376 Timing Reference High Resolution Signal B Too Many Pulses P0377 Timing Reference High Resolution Signal B Too Few Pulses OBD2 55 DTC Definitions GENERIC P0378 P0415 Code Definition P0378 Timing Reference High Resolution Signal B Intermittent Erratic Pulses P0379 Timing Reference High Resolution Signal B No Pulses P0380 Glow Plug Heater Circuit Malfunction P0381 Glow Plug Heater Indicator Circuit Malfunction P0382 Glow Plug Heater Circuit B Malfunction P0385 Crankshaft Position Sensor B Circuit Malfunction P0386 Crankshaft Position Sensor B Circuit Range Performance P0387 Crankshaft Position Sensor B Circuit Low Input P0388 Crankshaft Position Sensor B Circuit High Input P0389 Crankshaft Position Sensor B Circuit Intermittent P0390 Camshaft Position Sensor B Circuit Bank 2 P0391 Camshaft Position Sensor B Circuit Range Performance Bank 2 P0392 Camshaft Position Sensor B Circuit Low Input Bank 2 P0393 Camshaft Position Sensor B Circuit High Input Bank 2 P0394 Camshaft Position Sensor B Circuit Intermittent Bank 2 P0400 Exhaust Gas Recirculation Flow Malfunction P0401 Exhaust Gas Recirculation Flow Insufficient Detected P0402 Exhaust Gas Recirculation Flow Excessive Detected
60. d conditions Fuel System Continuous 3 similar Monitor conditions Catalytic Converter Once per Monitor trip 3 trips Oxygen Sensor Once per Monitor trip 3 trips Oxygen Sensor Once per Heater Monitor trip 3 trips Exhaust Gas Recirculation EGR Monitor Once per trip 3 trips Evaporative Emissions Controls Monitor Once per trip 3 trips Secondary Air System AIR Monitor Once per trip 3 trips 44 OBD2 DTC Definitions DIAGNOSTIC TROUBLE CODE DEFINITIONS DIAGNOSTIC TROUBLE CODE DEFINITIONS This section provides the most complete lists of DTC definitions available at the time of publication OBD 2 is an evolving system new codes and definitions are added as the system grows ALWAYS check your vehicle s service manual for code definitions that are not listed here This section contains both Generic and Manufacturer Specific DTC definitions e OBD 2 Powertrain Generic DTC Definitions apply to all makes and models of import and domestic vehicles that are OBD 2 COMPLIANT These DTCs always start with PO e OBD 2 Powertrain Manufacturer Specific DTC Definitions apply only to vehicles made by a specific manufacturer These DTCs always start with P1 Some codes may have more than one definition BE SURE to use the correct definition for your vehicle make model and year This manual provides Manufacturer Specific DTC definitions for
61. dal Position Sensor B Circuit Low Input P1222 Traction Control Output Circuit P1223 Pedal Position Sensor B Circuit High Input P1224 Throttle Position Sensor B Out Of Self Test Range P1227 Wastegate Failed Closed Over pressure P1228 P1229 Wastegate Failed Open Under pressure Charge Air Cooler Pump Driver P1230 Fuel Pump Low Speed Malfunction VLCM P1231 Fuel Pump Secondary Circuit Low High Speed VLCM P1232 Fuel Pump Speed Primary Circuit Two speed fuel pump 72 OBD 2 DTC Definitions FORD P1233 P1271 Code Definition P1233 Fuel Pump Driver Module Disabled or Off Line Fuel Pump Driver Module P1234 Fuel Pump Driver Module Disabled or Off Line Fuel Pump Driver Module P1235 Fuel Pump Control Out Of Range Fuel Pump Driver Module VLCM P1236 Fuel Pump Control Out Of Range Fuel Pump Driver Module P1237 Fuel Pump Secondary Circuit Fuel Pump Driver Module P1238 Fuel Pump Secondary Circuit Fuel Pump Driver Module P1239 Speed Fuel Pump Positive Feed P1243 Second Fuel Pump Fault or Ground Fault P1244 Alternator Load High Input P1245 Alternator Load Low Input P1246 Alternator Load Input P1247 Turbo Boost Pressure Low P1248 Turbo Boost Pressure Not Detected P1249 Wastegate Control Valve Performance P1252 Pedal Correlation PDS1 and LPDS High P1253 Pedal Correlation PDS1 and LPDS Low P1254 Pedal Correlation PDS2 and LPDS Hig
62. e engine coolant and other fluids for proper levels Top off low fluid levels if needed m Make sure the air filter is clean and in good condition Make sure all air filter ducts are properly connected Check the air filter ducts for holes rips or cracks m Make sure all engine belts are in good condition Check for cracked torn brittle loose or missing belts m Make sure mechanical linkages to engine sensors throttle gearshift position transmission etc are secure and properly connected See your vehicle s service manual for locations m Check all rubber hoses radiator and steel hoses vacuum fuel for leaks cracks blockage or other damage Make sure all hoses are routed and connected properly m Make sure all spark plugs are clean and in good condition Check for damaged loose disconnected or missing spark plug wires m Make sure the battery terminals are clean and tight Check for corrosion or broken connections Check for proper battery and charging system voltages m Check all electrical wiring and harnesses for proper connection Make sure wire insulation is in good condition and there are no bare wires m Make sure the engine is mechanically sound If needed perform a compression check engine vacuum check timing check if applicable etc 12 OBD2 Preparation for Testing VEHICLE SERVICE MANUALS VEHICLE SERVICE MANUALS Always refer to the manufacturer s service manual for your vehicle befor
63. e Code Reader is unable to communicate with vehicle s computer Do the following Turn the ignition key off wait 10 seconds and turn the key back on to reset the computer Make sure your vehicle is OBD 2 compliant See VEHICLES COVERED on page 6 for vehicle compliance verification information If the Code Reader is interrupted or disconnected during code retrieval procedure the screen will display Error 6 Read and interpret the Diagnostic Trouble Codes using the LCD display and the green yellow and red LEDs The green yellow and red LEDs are used with the LCD display as visual aids to make it easier for the user to determine engine system conditions 18 OBD2 Using Code Reader CODE RETRIEVAL PROCEDURE m Green LED Indicates that all engine systems are OK and running normally All monitors on the vehicle are active and are performing their diagnostic testing and no trouble codes are present A zero will show on Code Reader s LCD display for further confirmation m Yellow LED Indicates one of the following conditions PENDING CODE PRESENT If the yellow LED is lit it may indicate the existence of a pending code Check Code Reader s LCD display for confirmation A pending code is confirmed by the presence of a numeric code and the word PENDING on Code Reader s LCD display If no pending code is shown the yellow LED indicates Monitor Status see the following See DIAGNOSTIC TROUBLE CODES DTCs
64. e of meeting all of the new emissions standards and regulations It was also decided that an enhanced on board diagnostic system capable of addressing all of these problems was needed This new system is known as On Board Diagnostics Generation Two OBD 2 The primary objective of the OBD 2 system is to comply with the latest regulations and emissions standards established by CARB and the EPA 32 OBD2 Learning More COMPUTER ENGINE CONTROLS The Main Objectives of the OBD 2 System are To detect degraded and or failed emissions related components or systems that could cause tailpipe emissions to exceed by 1 5 times the Federal Test Procedure FTP standard To expand emissions related system monitoring This includes a set of computer run diagnostics called Monitors Monitors perform diagnostics and testing to verify that all emissions related components and or systems are operating correctly and within the manufacturer s specifications To use a standardized Diagnostic Link Connector DLC in all vehicles Before OBD 2 DLCs were of different shapes and sizes To standardize the code numbers code definitions and language used to describe faults Before OBD 2 each vehicle manufacturer used their own code numbers code definitions and language to describe the same faults m To expand the operation of the Malfunction Indicator Lamp MIL m To standardize communication procedures and protocols between the diagnostic eq
65. e performing any test or repair procedures Contact your local car dealership auto parts store or bookstore for availability of these manuals The following companies publish valuable repair manuals m Haynes Publications 861 Lawrence Drive Newbury Park California 91320 Phone 800 442 9637 m Mitchell International 14145 Danielson Street Poway California 92064 Phone 888 724 6742 m Motor Publications 5600 Crooks Road Suite 200 Troy Michigan 48098 Phone 800 426 6867 FACTORY SOURCES Ford GM Chrysler Honda Isuzu Hyundai and Subaru Service Manuals m Helm Inc 14310 Hamilton Avenue Highland Park Michigan 48203 Phone 800 782 4356 OBD2 13 Preparation for Testing PRELIMINARY VEHICLE DIAGNOSIS WORKSHEET PRELIMINARY VEHICLE DIAGNOSIS WORKSHEET The purpose of this form is to help you gather preliminary information on your vehicle before you retrieve codes By having a complete account of your vehicle s current problem s you will be able to systematically pinpoint the problem s by comparing your answers to the fault codes you retrieve You can also provide this information to your mechanic to assist in diagnosis and help avoid costly and unnecessary repairs It is important for you to complete this form to help you and or your mechanic have a clear understanding of your vehicle s problems NAME DATE VIN YEAR MAKE MODEL ENGINE SIZE VEHICLE MILEAGE VIN Vehicle Identification Num
66. eat to operating temperature to work properly The Secondary Air System Monitor checks for component integrity and system operation and tests for faults in the system The computer runs this Monitor once per trip The Secondary Air System Monitor is a Two Trip monitor If a fault is found on the first trip the computer temporarily saves this fault in its memory as a Pending Code The computer does not command the MIL on at this time If the fault is sensed again on the second trip the computer commands the MIL On and saves the code in its long term memory 43 Learning More OBD 2 MONITORS OBD 2 Reference Table The table below lists current OBD 2 Monitors and indicates the following for each Monitor A Monitor Type how often does the Monitor run Continuous or Once per trip B Number of trips needed with a fault present to set a pending DTC C Number of consecutive trips needed with a fault present to command the MIL On and store a DTC D Number of trips needed with no faults present to erase a Pending DTC E Number and type of trips or drive cycles needed with no faults present to turn off the MIL F Number of warm up periods needed to erase the DTC from the computer s memory after the MIL is turned off Name of Monitor Comprehensive Component Monitor Continuous 3 Misfire Monitor 3 similar Type 1 and 3 Continuous conditions Misfire Monitor 3 similar Continuous 3n Type 2 E
67. ed as a result of Government regulations as the OBD 2 system grows and matures Not all vehicles use all eleven Monitors Monitor operation is either Continuous or Non Continuous depending on the specific monitor Continuous Monitors Three of these Monitors are designed to constantly monitor their associated components and or systems for proper operation Continuous Monitors run constantly when the engine is running The Continuous Monitors are 1 Comprehensive Component Monitor CCM 2 Misfire Monitor 3 Fuel System Monitor Non Continuous Monitors The other eight Monitors are non continuous Monitors Non continuous Monitors perform and complete their testing once per trip The non continuous Monitors are 38 OBD2 Learning More OBD 2 MONITORS 1 Oxygen Sensor Monitor 2 Oxygen Sensor Heater Monitor 3 Catalyst Monitor 4 Heated Catalyst Monitor 5 EGR System Monitor 6 EVAP System Monitor 7 Secondary Air System Monitor 8 Air Conditioning A C Monitor The following provides a brief explanation of the function of each Monitor m Comprehensive Component Monitor CCM This Monitor OBD2 continuously checks all inputs and outputs from sensors actuators switches and other devices that provide a signal to the computer The Monitor checks for shorts opens out of range value functionality and rationality Rationality Each input signal is compared against all other inputs and again
68. edal Position Sensor 1 2 Correlation P1272 Accelerator Pedal Position Sensor 2 3 Correlation P1273 Accelerator Pedal Position Sensor 1 3 Correlation P1275 Boost Control Condition except 1997 98 Corvette P1275 Accelerator Pedal Positioning APP Sensor 1 Circuit 1997 98 Corvette P1276 Accelerator Pedal Positioning APP Sensor 1 Circuit Performance P1280 Accelerator Pedal Positioning APP Sensor 2 Circuit P1281 Accelerator Pedal Positioning APP Sensor 2 Circuit Performance P1285 Accelerator Pedal Positioning APP Sensor 2 Circuit P1286 Accelerator Pedal Positioning APP Sensor 2 Circuit Performance P1300 Ignition Coil 1 Primary Feedback Circuit P1305 Ignition Coil 2 Primary Feedback Circuit P1310 Ignition Coil 3 Primary Feedback Circuit P1315 Ignition Coil 4 Primary Feedback Circuit P1320 ICM 4X Reference Circuit Too Many Pulses except 1996 98 4 0L P1320 ICM 4X Reference Circuit Intermittent No Pulses 1996 98 4 0L 84 OBD 2 DTC Definitions GENERAL MOTORS P1323 P1406 Code Definition P1323 ICM 24X Reference Circuit Low Frequency P1335 Crankshaft Positioning Sensing Circuit P1336 CKP System Variation Not Learned P1345 Camshaft To Crankshaft Position Correlation Fault P1346 CKP Sensor System Variation Not Learned Intake Camshaft Position Performance P1349 Intake Camshaft Position System P1350 Ignition Control System P1351 Ignition Control Circuit Voltage High except 1998 3 1L P135
69. el Sensor 2 Circuit Voltage Low P1433 Fuel Level Sensor 2 Circuit Voltage High P1441 EVAP System Flow During Non Purge P1442 P1450 EVAP Vacuum Switch Circuit BARO Sensor Circuit P1451 BARO Sensor Circuit P1460 Cooling Fan Circuit except Catera P1460 Misfire Detected With Low Fuel Catera P1483 Engine Cooling System Performance P1500 Starter Signal Circuit P1501 Theft Deterrent System P1502 Theft Deterrent System No Password Received P1503 Theft Deterrent System Password Improper P1508 P1509 Idle Air Control IAC System Low RPM IAC System High RPM P1510 Back Up Power Supply P1511 Throttle Control System Backup System Performance P1514 TAC System MAF Performance P1515 Command vs Actual Throttle Position Performance PCM P1516 Command vs Actual Throttle Position Performance TAC Module P1517 TAC Module Processor P1518 PCM To TAC Module Serial Data Circuit P1519 Throttle Actuator Control Module P1520 Park Neutral Position Switch Circuit Gear Indicator System P1523 Throttle Closed Position Performance P1524 TPS Learned Closed Throttle Angle Degrees Out Of Range P1526 TPS Learn Not Completed P1527 Trans Range Pressure Switch Comparison 86 OBD 2 DTC Definitions GENERAL MOTORS P1530 P1571 Code Definition P1530 Ignition Ti
70. ems also provide control over other vehicle functions such as transmission brakes charging body and suspension systems OBD2 29 Learning More COMPUTER ENGINE CONTROLS The Basic Engine Computer Control System The Computer Control System consists of an on board computer and several related control devices sensors switches and actuators The on board computer is the heart of the Computer Control System The computer contains several programs with preset reference values for air fuel ratio spark or ignition timing injector pulse width engine speed etc Separate values are provided for various driving conditions such as idle low speed driving high speed driving low load or high load The preset reference values represent the ideal air fuel mixture spark timing transmission gear selection etc for any driving condition These values are programmed by the vehicle manufacturer and are specific to each vehicle model Most on board computers are located inside the vehicle behind the dashboard under the passenger s or driver s seat or behind the right kick panel However some manufacturers may still position it in the engine compartment Vehicle sensors switches and actuators are located throughout the engine and are connected by electrical wiring to the on board computer These devices include oxygen sensors coolant temperature sensors throttle position sensors fuel injectors etc Sensors and
71. eting I M Readiness Test Results 1 GREEN LED Indicates that all engine systems are OK and operating normally all Monitors supported by the vehicle have run and performed their self diagnostic testing The vehicle is ready for an Emissions Test Smog Check and there is a good possibility that it can be certified 24 OBD 2 2 3 Using Code Reader I M READINESS TESTING YELLOW LED Determine from the Code Retrieval Procedure page 17 which of the two possible conditions is causing the yellow LED to light m if a PENDING Diagnostic Trouble Code is causing the yellow LED to light it is possible that the vehicle will be allowed to be tested for emissions and certified Currently most areas states countries will allow an Emissions Test Smog Check to be performed if the only code in the vehicle s computer is a PENDING Diagnostic Trouble Code m f no running Monitors are causing the yellow LED to light then the issue of the vehicle being ready for an Emissions Test Smog Check depends on the emissions regulations and laws of your local area Some areas require that all Monitors indicate a Has Run status before they allow an Emissions Test Smog Check to be performed Other areas only require that some but not all Monitors have run their self diagnostic testing before an Emissions Test 8mog Check may be performed From the code retrieval procedure determine the status of eac
72. f the eleven monitors is designed to run diagnostics and testing on a different part of the engine or emissions system the Trip Drive Cycle needed for each individual Monitor to run and complete varies m OBD 2 Drive Cycle An OBD 2 Drive Cycle is an extended set of driving procedures that takes into consideration the various types of driving conditions encountered in real life These conditions may include starting the vehicle when it is cold driving the vehicle at a steady speed cruising accelerating etc An OBD 2 Drive Cycle begins when the ignition key is turned On when cold and ends when the vehicle has been driven in such a way as to have all the Enabling Criteria met for all its applicable Monitors Only those trips that provide the Enabling Criteria for all Monitors applicable to the vehicle to run and complete their individual diagnostic tests qualify as an OBD 2 Drive Cycle OBD 2 Drive Cycle requirements vary from one model of vehicle to another Vehicle manufacturers set these procedures Consult your vehicle s service manual for OBD 2 Drive Cycle procedures 34 OBD2 Learning More DIAGNOSTIC TROUBLE CODES DTCs Do not confuse a Trip Drive Cycle with an OBD 2 Drive Cycle A Trip Drive Cycle provides the Enabling Criteria for one specific Monitor to run and complete its diagnostic testing An OBD 2 Drive Cycle must meet the Enabling Criteria for all Monitors on a particular vehicle to run and complete
73. ge Whether you are a put the key in and go consumer hobby mechanic or skilled DlYer Code Reader offers the features and functions you need to take control of your vehicle s testing servicing and maintenance needs OBD 2 Code Reader helps you m Save time and money by locating and identifying problems before servicing your vehicle m Access the same information your mechanic has for less Prevent future costly repairs and maintain engine per formance with routine inspections See if you re ready for an emissions test smog check Check your vehicle for road trip readiness Turn off the CHECK ENGINE light Inspect a used vehicle before buying or selling and more OBD2 1 Introduction WHAT IS OBD WHAT IS OBD OBD 2 Code Reader is designed to work on all OBD 2 compliant vehicles All 1996 and newer vehicles cars light trucks and SUVs sold in the United States are OBD 2 compliant One of the most exciting improvements in the automobile industry was the addition of on n board diagnostics OBD on vehicles or in gt A 7 more basic terms the computer that SA activates the vehicle s CHECK ENGINE light OBD1 was designed to monitor manufacturer specific systems on vehicles built from 1981 to 1995 Then came the development of OBD 2 which is on all 1996 and newer vehicles sold in the U S Like its predecessor OBD 2 was adopted as part of a government mandate to lower vehicle emissions Bu
74. h P1255 Pedal Correlation PDS2 and LPDS Low P1256 Pedal Correlation PDS1 and HPDS P1257 Pedal Correlation PDS2 and HPDS P1258 Pedal Correlation PDS1 and PDS2 P1260 Theft Detected Vehicle Immobilized P1261 Oylinder 1 High To Low Side Short P1262 Cylinder 2 High To Low Side Short P1263 Cylinder 3 High To Low Side Short P1264 Cylinder 4 High To Low Side Short P1265 Cylinder 5 High To Low Side Short P1266 Cylinder 6 High To Low Side Short P1267 Cylinder 7 High To Low Side Short P1268 Cylinder 8 High To Low Side Short P1270 Engine RPM or Vehicle Speed Limiter Reached P1271 Cylinder 1 High To Low Side Open OBD 2 73 DTC Definitions FORD P1272 P1306 Code P1272 Definition Cylinder 2 High To Low Side Open P1273 Cylinder 3 High To Low Side Open P1274 Cylinder 4 High To Low Side Open P1275 Cylinder 5 High To Low Side Open P1276 Cylinder 6 High To Low Side Open P1277 Cylinder 7 High To Low Side Open P1278 Cylinder 8 High To Low Side Open P1280 Injector Control Pressure Out Of Range Low P1281 P1282 Injector Control Pressure Out Of Range High Excessive Injector Control Pressure P1283 Injector Pressure Regulator Circuit P1284 Aborted KOER Injector Control Pressure Failure P1285 Cylinder Head Overtemperature Condition P1286 Fuel Pulsewidth In Range B
75. h Monitor a solid Monitor icon shows Monitor Has Run status a flashing Monitor icon indicates Has Not Run status Take this information to an emissions professional to determine based on your test results if your vehicle is ready for an Emissions Test Smog Check RED LED Indicates there is a problem with one or more of the vehicle s systems A vehicle displaying a red LED is definitely not ready for an Emissions Test Smog Check The red LED is also an indication that there are Diagnostic Trouble Code s present displayed on the Code Reader s screen The Multifunction Indicator Check Engine Lamp on the vehicle s instrument panel will light steady on The problem that is causing the red LED to light must be repaired before an Emissions Test Smog Check can be performed It is also suggested that the vehicle be inspected repaired before driving the vehicle further If the Red LED was obtained there is a definite problem present in OBD2 the system s In these cases you have the following options 25 Using Code Reader I M READINESS TESTING m Repair the vehicle yourself If you are going to perform the repairs yourself proceed by reading the vehicle service manual and following all its procedures and recommendations m Take the vehicle to a professional to have it serviced The problem s causing the red LED to light must be repaired before the vehicle is ready for an Emissions Test Smog Check Usi
76. he 27 Using Code Reader WHAT S NEXT red LED to light must be repaired before an Emissions Test Smog Check can be performed It is also suggested that the vehicle be inspected repaired before driving the vehicle further When inspecting a used vehicle before buying or selling m A GREEN LED indicates that all emissions related systems are OK and operating normally You can feel confident that these vehicle systems are mechanically sound Always BE SURE to check other vehicle systems NOT covered by Code Reader transmission brakes etc as well as the vehicle s service record before buying or selling a vehicle m A YELLOW LED indicates a Pending DTC is present and or some of the vehicle s emission monitors have not run their diagnostic testing Further testing and evaluation may be needed to determine the vehicle s actual condition m A RED LED indicates there is a problem with one or more of the vehicle s systems It is recommended that you take the vehicle qualified service technician for further diagnosis If no codes were retrieved and or the green lights and all your vehicle s Monitors show a Has Run status you re good to go You can feel confident that m The systems and components monitored by your vehicle s on board computer are in good working order and running properly m Your vehicle should pass an Emissions Test Smog Check without problem If codes were retrieved and or the yellow
77. ion Coil Primary Secondary Circuit Malfunction P0351 Ignition Coil A Primary Secondary Circuit Malfunction P0352 Ignition Coil B Primary Secondary Circuit Malfunction P0353 Ignition Coil C Primary Secondary Circuit Malfunction P0354 Ignition Coil D Primary Secondary Circuit Malfunction P0355 Ignition Coil E Primary Secondary Circuit Malfunction P0356 Ignition Coil F Primary Secondary Circuit Malfunction P0357 Ignition Coil G Primary Secondary Circuit Malfunction P0358 Ignition Coil H Primary Secondary Circuit Malfunction P0359 Ignition Coil Primary Secondary Circuit Malfunction P0360 Ignition Coil J Primary Secondary Circuit Malfunction P0361 Ignition Coil K Primary Secondary Circuit Malfunction P0362 Ignition Coil L Primary Secondary Circuit Malfunction P0365 Camshaft Position Sensor B Circuit Bank 1 P0366 Camshaft Position Sensor B Circuit Range Performance Bank 1 P0367 Camshaft Position Sensor B Circuit Low Input Bank 1 P0368 Camshaft Position Sensor B Circuit High Input Bank 1 P0369 Camshaft Position Sensor B Circuit Intermittent Bank 1 P0370 Timing Reference High Resolution Signal A Malfunction P0371 Timing Reference High Resolution Signal A Too Many Pulses P0372 Timing Reference High Resolution Signal A Too Few Pulses P0373 Timing Reference High Resolution Signal A Intermittent Erratic Pulses P0374 Timing Referen
78. iving at steady speed cruising accelerating etc DTC s Diagnostic Trouble Code s EGR Exhaust Gas Recirculation EPA Environmental Protection Agency EVAP Evaporative Emissions System Fault Code See DTCs Freeze Frame A digital representation of engine and or emissions system conditions present when a fault code was recorded FTP Fuel Tank Pressure Generic Code A DTC that applies to all OBD 2 compliant vehicles I M Readiness An indication of whether or not a vehicle s emissions related system are operating properly and are ready for Inspection and Maintenance testing I M Test Emissions Test Smog Check A functional test of a vehicle to determine if tailpipe emissions are within Federal State Local requirements LCD Liquid Crystal Display LED Light Emitting Diode OBD2 97 GLOSSARY GLOSSARY OF TERMS AND ABBREVIATIONS 98 Manufacturer Specific Code A DTC that applies only to OBD 2 compliant vehicles made by a specific manufacturer MIL Malfunction Indicator Lamp also referred to as Check Engine light OBD 1 On Board Diagnostics Version 1 also referred to as OBD OBD 2 On Board Diagnostics Version 2 also referred to as OBD II On Board Computer The central processing unit in the vehicle s computer control system PCM Powertrain Control Module Pending Code A code recorded on the first trip for a two trip code If the fau
79. le s computer memory If no codes are present a 0 will be displayed Code Reader is capable of retrieving and storing up to 32 codes in memory for immediate or later viewing OBD2 19 Using Code Reader ERASING DIAGNOSTIC TROUBLE CODES DTCs 7 If more than one code is present press and release the SCROLL button as necessary to display additional codes m Whenever the SCROLL function is used to view additional codes Code Reader s communication link with the vehicle s computer disconnects To re establish communication press the LINK T button again Freeze Frame data is always associated with the Priority Code identified as Code 1 in the Code Reader s display If the FREEZE FRAME icon is lit when the Priority Code Code 1 is displayed on the Code Reader s screen it indicates that there is Freeze Frame data associated with this code and the vehicle s computer has saved it in its memory 8 To prolong battery life Code Reader automatically turns Off approximately one minute after it is disconnected from the vehicle Retrieved codes remain in Code Reader s memory and may be viewed at any time by turning the unit On If Code Reader s batteries are removed or if Code Reader is re linked to a vehicle to retrieve codes any codes currently in its memory are automatically cleared Refer to page 45 for Diagnostic Trouble Code definitions Match the retrieved DTC s with those listed Read the associated
80. linder 12 Injector Circuit Low P0295 Cylinder 12 Injector Circuit High P0296 Cylinder 12 Contribution Balance Fault P0298 Engine Oil Over Temperature P0300 Random Multiple Cylinder Misfire Detected P0301 P0302 Cylinder 1 Misfire Detected Cylinder 2 Misfire Detected P0303 Cylinder 3 Misfire Detected P0304 Cylinder 4 Misfire Detected P0305 Cylinder 5 Misfire Detected P0306 Cylinder 6 Misfire Detected OBD 2 53 DTC Definitions GENERIC P0307 P0344 Code P0307 Definition Cylinder 7 Misfire Detected P0308 Cylinder 8 Misfire Detected P0309 Cylinder 9 Misfire Detected P0310 Cylinder 10 Misfire Detected P0311 Cylinder 11 Misfire Detected P0312 Cylinder 12 Misfire Detected P0313 Misfire Detected with Low Fuel P0314 Single Cylinder Misfire Cylinder not specified P0320 P0321 Ignition Distributor Engine Speed Input Circuit Malfunction Ignition Distributor Engine Speed Input Circuit Range Performance P0322 Ignition Distributor Engine Speed Input Circuit No Signal P0323 Ignition Distributor Engine Speed Input Circuit Intermittent P0324 Knock Control System Error P0325 P0326 Knock Sensor 1 Circuit Malfunction Bank 1 or Single Sensor Knock Sensor 1 Circuit Range Performance Bank 1 or Single Sensor P0327 Knock Sensor 1 Circuit Low Input Bank 1 or Si
81. lt that caused the code to be set is not detected on the second trip the code is automatically erased Trip Drive Cycle Vehicle operation that provides the necessary driving condition to enable a vehicle Monitor to run and complete its diagnostic testing VECI Vehicle Emission Control Information Decal OBD2 Warranty and Servicing LIMITED ONE YEAR WARRANTY The Manufacturer warrants to the original purchaser that this unit is free of defects in materials and workmanship under normal use and maintenance for a period of one 1 year from the date of original purchase If the unit fails within the one 1 year period it will be repaired or replaced at the Manufacturer s option at no charge when returned prepaid to the Service Center with Proof of Purchase The sales receipt may be used for this purpose Installation labor is not covered under this warranty All replacement parts whether new or remanufactured assume as their warranty period only the remaining time of this warranty This warranty does not apply to damage caused by improper use accident abuse improper voltage service fire flood lightning or other acts of God or if the product was altered or repaired by anyone other than the Manufacturer s Service Center The Manufacturer under no circumstances shall be liable for any consequential damages for breach of any written warranty of this unit This warranty gives you specific legal rights and you may al
82. lve Control Circuit Low P0035 Turbo Charger Bypass Valve Control Circuit High P0036 HO2S Heater Control Circuit Bank 1 Sensor 2 P0037 HO2S Heater Control Circuit Low Bank 1 Sensor 2 P0038 HO2S Heater Control Circuit High Bank 1 Sensor 2 P0042 HO2S Heater Control Circuit Bank 1 Sensor 3 P0043 HO2S Heater Control Circuit Low Bank 1 Sensor 3 P0044 HO2S Heater Control Circuit High Bank 1 Sensor 3 P0050 HO2S Heater Control Circuit Bank 2 Sensor 1 P0051 HO2S Heater Control Circuit Low Bank 2 Sensor 1 P0052 HO2S Heater Control Circuit High Bank 2 Sensor 1 P0056 HO2S Heater Control Circuit Bank 2 Sensor 2 P0057 HO2S Heater Control Circuit Low Bank 2 Sensor 2 46 OBD 2 DTC Definitions GENERIC P0058 P0106 Code Definition P0058 HO2S Heater Control Circuit High Bank 2 Sensor 2 P0062 HO2S Heater Control Circuit Bank 2 Sensor 3 P0063 HO2S Heater Control Circuit Low Bank 2 Sensor 3 P0064 A HO2S Heater Control Circuit High Bank 2 Sensor 3 P0065 Air Assisted Injector Control Range Performance P0066 Air Assisted Injector Control Circuit or Circuit Low P0067 Air Assisted Injector Control Circuit High P0070 Ambient Air Temperature Sensor Circuit P0071 Ambient Air Temperature Sensor Range Performance P0072 Ambient Air Temperature Sensor Circuit Low Input P0073 Ambient Air Temperature Sensor
83. ming Adjustment Switch Circuit P1530 A C Refrigerant Pressure Sensor Error P1531 Low Air Conditioning Refrigerant Charge P1532 A C Evaporator Temperature Circuit Voltage Low P1533 A C Low Side Temperature Sensor Circuit P1535 A C High Side Temperature Sensor Circuit P1536 A C System ECT Overtemperature P1537 A C Request Circuit Voltage Low P1538 A C Request Circuit Voltage High P1539 A C High Pressure Switch Circuit Voltage High P1540 A C System High Pressure P1542 A C System High Pressure High Temperature P1543 A C System Performance P1545 A C Clutch Relay Control Circuit P1546 A C Clutch Relay Control Circuit Voltage Low except 1996 98 Camaro Firebird amp 1997 98 Corvette P1546 A C Clutch Status Circuit Voltage Low 1996 98 Camaro Firebird amp 1997 98 Corvette P1550 Stepper Motor Speed Control P1554 Speed Control Status Circuit P1555 Electronic Variable Orifice Fault Saturn P1558 Speed Control SPS Low P1560 Speed Control System Transaxle Not In Drive P1561 Speed Control Vent Solenoid P1562 Speed Control Vacuum Solenoid P1564 Speed Control System Vehicle Acceleration Too High except Catera P1564 ECM Battery Voltage Loss Catera P1565 Speed Control Servo Position Sensor P1566 Speed Control System Engine RPM Too High P1567 Speed Control Switches ABCS Active P1568 Speed Control SPS High P1570 Speed Control System Traction Control Active P1571 TCS Desired Torque Circuit except 4 0L 4
84. n command a Monitor to run tests on its related system These conditions are known as Enabling Criteria The requirements and procedures vary for each Monitor Some Monitors only require the ignition key to be turned On for them to run and complete their diagnostic testing Others may require a set of complex procedures such as starting the vehicle when cold bringing it to operating temperature and driving the vehicle under specific conditions before the Monitor can run and complete its diagnostic testing m Monitor Has Has Not Run The terms Monitor has run or Monitor has not run are used throughout this manual Monitor has run means the PCM has commanded a particular Monitor to perform the required diagnostic testing on a system to ensure the System is operating correctly within factory specifications The term Monitor has not run means the PCM has not yet commanded a particular Monitor to perform diagnostic testing on its associated part of the emissions system m Trip A Trip for a particular Monitor requires that the vehicle is driven in such a way that all the Enabling Criteria for the Monitor to run and complete its diagnostic testing are met The Trip Drive Cycle for a particular Monitor begins when the ignition key is turned On It is successfully completed when all the Enabling Criteria for the Monitor to run and complete its diagnostic testing are met by the time the ignition key is turned Off Since each o
85. necting or disconnecting test equipment when the ignition is ON can damage test equipment and the vehicle s electronic components Turn the ignition OFF before connecting Code Reader to or disconnecting Code Reader from the vehicle s Data Link Connector DLC 4 OBD2 OBD2 Safety Precautions SAFETY FIRST To prevent damage to the on board computer when taking vehicle electrical measurements always use a digital multimeter with at least 10 megOhms of impedance The vehicle s battery produces highly flammable hydrogen gas To prevent an explosion keep all sparks heated items and open flames away from the battery Don t wear loose clothing or jewelry when working on an engine Loose clothing can become caught in the fan pulleys belts etc Jewelry is highly conductive and can cause a severe burn if it makes contact between a power Source and ground About Code Reader VEHICLES COVERED VEHICLES COVERED OBD 2 Code Reader is designed to work on all OBD 2 compliant vehicles All 1996 and newer vehicles cars and light trucks sold in the United States are OBD 2 compliant Federal law requires that all 1996 and newer cars and light trucks sold in the United States must be OBD 2 compliant this includes all Domestic Asian and European vehicles Some 1994 and 1995 vehicles are OBD 2 compliant To find out if a 1994 or 1995 vehicle is OBD 2 compliant check the following 1 The Vehicle Emissions Control Inf
86. neration OBD 1 With the exception of some 1994 and 1995 vehicles most vehicles from 1982 to 1995 are equipped with OBD 1 systems Beginning in 1988 California s Air Resources Board CARB and later the Environmental Protection Agency EPA required vehicle manufacturers to include a self diagnostic program in their on board computers The program would be capable of identifying emissions related faults in a system The first generation of Onboard Diagnostics came to be known as OBD 1 OBD 1 is a set of self testing and diagnostic instructions programmed into the vehicle s on board computer The programs are specifically designed to detect failures in the sensors actuators switches and wiring of the various vehicle emissions related systems If the computer detects a failure in any of these components or systems it lights an indicator on the dashboard to alert the driver The indicator lights only when an emissions related problem is detected The computer also assigns a numeric code for each specific problem that it detects and stores these codes in its memory for later retrieval These codes can be retrieved from the computer s memory with the use of a Code Reader or a Scan Tool OBD2 31 Learning More COMPUTER ENGINE CONTROLS On Board Diagnostics Second Generation OBD 2 In addition to performing all the functions of the OBD 1 System the OBD 2 System has been enhanced The OBD 2 System is an with
87. new Diagnostic Programs These enhancement of the programs closely monitor the OBD 1 System functions of various emissions related components and systems as well as other systems and make this information readily available with the proper equipment to the technician for evaluation The California Air Resources Board CARB conducted studies on OBD 1 equipped vehicles The information that was gathered from these studies showed the following m A large number of vehicles had deteriorating or degraded emissions related components These components were causing an increase in emissions m Because OBD 1 systems only detect failed components the degraded components were not setting codes m Some emissions problems related to degraded components only occur when the vehicle is being driven under a load The emission checks being conducted at the time were not performed under simulated driving conditions As a result a significant number of vehicles with degraded components were passing Emissions Tests m Codes code definitions diagnostic connectors communication protocols and emissions terminology were different for each manufacturer This caused confusion for the technicians working on different make and model vehicles To address the problems made evident by this study CARB and the EPA passed new laws and standardization requirements These laws required that vehicle manufacturers to equip their new vehicles with devices capabl
88. ng normally You can feel confident that the vehicle is mechanically sound and suitable for travel Always BE SURE to check fluid levels tire pressure etc before any prolonged travel A YELLOW LED indicates a Pending DTC is present and or some of the vehicle s emission monitors have not run their diagnostic testing Further testing and evaluation may be needed to determine your vehicle s road trip readiness A RED LED indicates there is a problem with one or more of the vehicle s systems The vehicle should be inspected repaired before driving the vehicle further When checking to see if your vehicle is ready for an Emissions Te E OBD 2 st Smog Check A GREEN LED indicates that all engine systems are OK and operating normally The vehicle is ready for an Emissions Test Smog Check and there is a good possibility that it can be certified A YELLOW LED indicates a Pending DTC is present and or some of the vehicle s emission monitors have not run their diagnostic testing The issue of the vehicle being ready for an Emissions Test Smog Check depends on the emissions regulations and laws of your local area Have an emissions professional review your test results to determine if your vehicle is ready for an Emissions Test Smog Check A RED LED indicates there is a problem with one or more of the vehicle s systems The vehicle is most likely not ready for an Emissions Test Smog Check The problem that is causing t
89. ng the I M Readiness Monitor Status to Confirm a Repair The I M Readiness Monitor Status function can be used after repair of a fault has been performed to confirm that the repair has been performed correctly and or to check for Monitor Run Status Use the following procedure to determine I M Readiness Monitor Status 1 Using retrieved Diagnostic Trouble Codes DTCs and code definitions as a guide and following manufacturer s repair procedures repair the fault or faults as instructed 2 After the fault or faults have been repaired connect Code Reader to the vehicle s DLC and erase the code or codes from the vehicle s computer memory W See page 20 for procedures to erase DTCs from the vehicle s on board computer m Write the codes down on a piece of paper for reference before erasing 3 After the erase procedure is performed most of the Monitor icons on the Code Reader s LCD display will be flashing Leave Code Reader connected to the vehicle and perform a Trip Drive Cycle for each flashing Monitor Misfire Fuel and Comprehensive Component Monitors run continuously and their icons will always be on solid even after the erase function is performed m Each DTC is associated with a specific Monitor Consult the vehicle s service manual to identify the Monitor or Monitors associated with the faults that were repaired Follow the manufacturer s procedures to perform a Trip Drive Cycle for the appropriate Monitors m
90. ngle Sensor P0328 Knock Sensor 1 Circuit High Input Bank 1 or Single Sensor P0329 Knock Sensor 1 Circuit Intermittent Bank 1 or Single Sensor P0330 P0331 Knock Sensor 2 Circuit Malfunction Bank 2 Knock Sensor 2 Circuit Range Performance Bank 2 P0332 Knock Sensor 2 Circuit Low Input Bank 2 P0333 Knock Sensor 2 Circuit High Input Bank 2 P0334 Knock Sensor 2 Circuit Intermittent Bank 2 P0335 Crankshaft Position Sensor A Circuit Malfunction P0336 Crankshaft Position Sensor A Circuit Range Performance P0337 Crankshaft Position Sensor A Circuit Low Input P0338 Crankshaft Position Sensor A Circuit High Input P0339 Crankshaft Position Sensor A Circuit Intermittent P0340 P0341 Camshaft Position Sensor Circuit Malfunction Camshaft Position Sensor Circuit Range Performance P0342 Camshaft Position Sensor Circuit Low Input P0343 Camshaft Position Sensor Circuit High Input P0344 Camshaft Position Sensor Circuit Intermittent 54 OBD2 DTC Definitions GENERIC P0345 P0377 Code Definition P0345 Camshaft Position Sensor A Circuit Bank 2 P0346 Camshaft Position Sensor A Circuit Range Performance Bank 2 P0347 Camshaft Position Sensor A Circuit Low Input Bank 2 P0348 Camshaft Position Sensor A Circuit High Input Bank 2 P0349 Camshaft Position Sensor A Circuit Intermittent Bank 2 P0350 Ignit
91. nse Bank 1 Sensor 1 P0134 O2 Sensor Circuit No Activity Detected Bank 1 Sensor 1 P0135 O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 1 P0136 O2 Sensor Circuit Malfunction Bank 1 Sensor 2 48 OBD2 DTC Definitions GENERIC P0137 P0170 Code Definition P0137 O2 Sensor Circuit Low Voltage Bank 1 Sensor 2 P0138 O2 Sensor Circuit High Voltage Bank 1 Sensor 2 P0139 O2 Sensor Circuit Slow Response Bank 1 Sensor 2 P0140 O2 Sensor Circuit No Activity Detected Bank 1 Sensor 2 P0141 O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 2 P0142 O2 Sensor Circuit Malfunction Bank 1 Sensor 3 P0143 O2 Sensor Circuit Low Voltage Bank 1 Sensor 3 P0144 O2 Sensor Circuit High Voltage Bank 1 Sensor 3 P0145 O2 Sensor Circuit Slow Response Bank 1 Sensor 3 P0146 O2 Sensor Circuit No Activity Detected Bank 1 Sensor 3 P0147 O2 Sensor Heater Circuit Malfunction Bank 1 Sensor 3 P0148 Fuel Delivery Error P0149 Fuel Timing Error P0150 O2 Sensor Circuit Malfunction Bank 2 Sensor 1 P0151 O2 Sensor Circuit Low Voltage Bank 2 Sensor 1 P0152 O2 Sensor Circuit High Voltage Bank 2 Sensor 1 P0153 O2 Sensor Circuit Slow Response Bank 2 Sensor 1 P0154 O2 Sensor Circuit No Activity Detected Bank 2 Sensor 1 P0155 O2 Sensor Heater Circuit Malfunction Bank 2 Sensor 1 P0156 O2 Sensor Circuit Malfunction Bank 2 Sensor 2 P0157 O2 Sensor Circuit Low Voltage Bank 2 Sensor 2 P0158 O2 Sensor Circuit High Voltage
92. ntrol Lamp Control Circuit P0650 Malfunction Indicator Lamp MIL Control Circuit Malfunction P0654 Engine RPM Output Circuit Malfunction P0655 Engine Hot Lamp Output Control Circuit Malfunction P0656 Fuel Level Output Circuit Malfunction P0660 Intake Manifold Tuning Valve Control Circuit Bank 1 P0661 Intake Manifold Tuning Valve Control Circuit Low Bank 1 P0662 Intake Manifold Tuning Valve Control Circuit High Bank 1 P0663 Intake Manifold Tuning Valve Control Circuit Bank 2 P0664 Intake Manifold Tuning Valve Control Circuit Low Bank 2 P0665 Intake Manifold Tuning Valve Control Circuit High Bank 2 P0700 Transmission Control System Malfunction P0701 Transmission Control System Range Performance P0702 Transmission Control System Electrical P0703 Torque Converter Brake Switch B Circuit Malfunction P0704 Clutch Switch Input Circuit Malfunction P0705 Transmission Range Sensor Circuit Malfunction PRNDL Input P0706 Transmission Range Sensor Circuit Range Performance P0707 Transmission Range Sensor Circuit Low Input P0708 Transmission Range Sensor Circuit High Input P0709 Transmission Range Sensor Circuit Intermittent P0710 Transmission Fluid Temperature Sensor Circuit Malfunction P0711 Transmission Fluid Temperature Sensor Circuit Range Performance 62 OBD2 DTC Definitions GENERIC P0712 P0746 Code Definition P0712 Transmission Fluid Temperature Sensor Circuit Low Input P0713 Transmission
93. ormation VECI Label This label is located under the hood or by the radiator of most vehicles If the vehicle is OBD 2 compliant the label will state OBD II Certified VEHICLE EMISSION CONTROL INFORMATION ENGINE FAMILY EFN2 6YBT2BA OBD II DISPLACEMENT 2 6L CERTIFIED x a VEHICLE this VEHICLE CONFORMS TO U S EPA AND STATE a MANUFACTURER OF CALIFORNIA REGULATIONS APPLICABLE TO 1999 MODEL YEAR NEW TLEV PASSENGER CARS OBD Il REFER TO SERVICE MANUAL FOR ADDITIONAL INFORMATION TUNE UP CONDITIONS NORMAL OPERATING ENGINE TEMPERATURE CERTIFIED ACCESSORIES OFF COOLING FAN OFF TRANSMISSION IN NEUTRAL EXHAUST EMISSIONS STANDARDS STANDARD CATEGORY CERTIFICATION IN USE TLEV TLEV INTERMEDIATE SPARK PLUG emere earALYST lll GAP 1 1MM 2 Government Regulations require that all OBD 2 compliant vehicles must 45 67 8 O have a common sixteen pin Data 1213141516 Link Connector DLC Some 1994 and 1995 vehicles have 16 pin connectors but are not OBD 2 compliant Only those vehicles with a Vehicle Emissions Control Label stating OBD II Certified are OBD 2 compliant e Beginning in 2008 a very limited number of manufacturers including Ford General Motors Mazda and Saab began using a new computer protocol called Controller Area Network CAN on some OBD 2 vehicles In basic terms CAN allows manufacturers to increase and diversify the speed at which the com
94. p TCM P1601 Loss of Serial Communication Except Catera P1601 P1602 ECM Overtemperature Loss Of EBC EBTOM Serial Data Except Catera P1602 KS Module Circuit Catera P1603 Loss Of SDM Serial Data P1604 Loss of IPC Serial Data P1605 Loss of HVAC Serial Data P1607 Engine Oil Level Switch Circuit P1610 Loss Of PZM Serial Data 1996 97 Except 1997 Cutlass amp Malibu P1610 Failure With Body Function Controller 1997 Cutlass amp Malibu 88 OBD2 DTC Definitions GENERAL MOTORS P1610 P1642 Code Definition P1610 Standard Body Module Series Data CKT 1998 P1611 Loss Of CVRTD Serial Data P1617 Engine Oil Level Switch Circuit P1619 Engine Oil Lite Monitor Reset Circuit P1620 Low Engine Coolant Level Saturn P1621 PCM Memory Performance Except 1998 5 7L P1621 VCM EEPROM Performance 1998 5 7L P1623 PCM Prom Error Transaxle Temperature Pull Up Resistor Fault Saturn Z body P1624 Customer Snapshot Data Available Saturn P1625 TCM Flash Checksum Fault Saturn P1626 Theft Deterrent System Fuel Enable Circuit P1627 A D Performance P1628 PCM Engine Control Temp Pull Up Resistor P1629 Theft Deterrent System Fuel Enable Circuit Improper Signal Detected During Engine Cranking Except 1997 98 2 2L 2 4L 3 1L amp 3 8L P1629 Theft Deterrent Crank Signal Malfunction 1997 98 2 2L 2 4L 3 1L amp 3 8L P1630 Theft Deterrent System PCM
95. pecific Generic DTCs are codes that are used by all vehicle manufacturers The standards for generic DTCs as well as their definitions are set by the Society of Automotive Engineers SAE Manufacturer Specific DTCs are codes that are controlled by the vehicle manufacturer The Federal Government does not require manufacturer specific codes in order to comply with the new OBD 2 emissions standards However manufacturers are free to expand beyond the required codes to make their systems easier to diagnose OBD2 35 Learning More DIAGNOSTIC TROUBLE CODES DTCs OBD 2 DTC EXAMPLE P0201 Injector Circuit Malfunction Cylinder 1 B Body C Chassis P Powertrain U Network 0 Generic 1 Manufacturer Specific Identifies the system where the problem is located 1 Fuel and Air Metering 2 Fuel and Air Metering injector circuit malfunction only 3 Ignition System or Misfire 4 Auxiliary Emission Control System 5 Vehicle Speed Control and Idle Control System 6 Computer Output Circuits 7 Transmission 8 Transmission Identifies what section of the system is malfunctioning m The 3rd character is a numeric digit It identifies the specific System or sub system where the problem is located m The 4th and 5th characters are numeric digits They identify the section of the system that is malfunctioning DTCs and MIL Status When the vehicle s on board computer detects a failu
96. period As a result vehicle manufacturers were not only required to comply with the new emissions standards they also had to make their vehicles more fuel efficient Most vehicles were required to meet a miles per gallon MPG standard set by the U S Federal Government Precise fuel delivery and spark timing are needed to reduce vehicle emissions Mechanical engine controls in use at the time such as ignition points mechanical spark advance and the carburetor responded too slowly to driving conditions to properly control fuel delivery and spark timing This made it difficult for vehicle manufacturers to meet the new standards A new Engine Control System had to be designed and integrated with the engine controls to meet the stricter standards The new system had to m Respond instantly to supply the proper mixture of air and fuel for any driving condition idle cruising low speed driving high speed driving etc m Calculate instantly the best time to ignite the air fuel mixture for maximum engine efficiency m Perform both these tasks without affecting vehicle performance or fuel economy Vehicle Computer Control Systems can perform millions of calculations each second This makes them an ideal substitute for the slower mechanical engine controls By switching from mechanical to electronic engine controls vehicle manufacturers are able to control fuel delivery and spark timing more precisely Some newer Computer Control Syst
97. puter communicates with different systems in the vehicle CAN will be mandatory on all cars by 2008 The OBD 2 Code Header is compatible with all OBD 2 protocols including CAN 6 OBD2 About Code Reader BATTERY REPLACEMENT Data Link Connector DLC Location The 16 pin DLC is usually located under the instrument panel dash within 12 inches 300 mm of center of the panel on the driver s side of most vehicles It should be easily accessible and visible i gt y t 2 pie BEHIND from a kneeling position lt SS pease outside the vehicle with the LEFTCORNER OF DASH door open is On some Asian and European vehicles the DLC is located behind the ashtray the ashtray must be removed to access it or on the far left corner of the dash If the DLC cannot be located consult the vehicle s service manual for the location BATTERY REPLACEMENT 1 Locate the battery cover on the back of Code Reader 2 Lift the battery cover off use your finger or a small coin 3 Replace batteries with two AA size batteries for longer life use Alkaline type batteries 4 Reinstall the battery cover on the back of Code Reader This tool has an early low battery warning If a low battery condition is detected when the Code Reader is turned On the battery icon and the three LEDs will flash every second for 10 seconds to warn you that it s time to replace the batteries It is suggested that you replace the batteries a
98. r CODE RETRIEVAL PROCEDURE CODE RETRIEVAL PROCEDURE Retrieving and using Diagnostic Trouble Codes DTCs for troubleshooting vehicle operation is only one part of an overall diagnostic strategy Never replace a part based only on the DTC definition Each DTC has a set of testing procedures instructions and flow charts that must be followed to confirm the location of the problem This information is found in the vehicle s service manual Always refer to the vehicle s service manual for detailed testing instructions Check your vehicle thoroughly before performing any test See Preparation for Testing on page 12 for details ALWAYS observe safety precautions whenever working on a vehicle See Safety Precautions on page 4 for more information 1 Turn the ignition off 2 Locate the vehicle s 16 pin Data Link Connector DLC See page 7 for connector location Some DLCs have a plastic cover that must be removed before connecting the Code Reader cable connector 3 Turn the Code Reader off and connect the Code Reader cable connector to the vehicle s DLC The cable connector is keyed and will only fit one way m f you have problems connecting the cable connector to the DLC rotate the connector 180 and try again If you still have problems check the DLC on the vehicle and on the Code Reader Refer to your vehicle s service manual to properly check the vehicle s DLC m After the Code Reader s cable is s
99. r Steering Pressure Sensor Circuit Range Performance P0552 Power Steering Pressure Sensor Circuit Low Input P0553 Power Steering Pressure Sensor Circuit High Input P0554 Power Steering Pressure Sensor Circuit Intermittent P0560 System Voltage Malfunction P0561 System Voltage Unstable P0562 System Voltage Low P0563 System Voltage High P0564 Cruise Control Multi Function Input Signal P0565 Cruise Control On Signal Malfunction P0566 Cruise Control Off Signal Malfunction P0567 Cruise Control Resume Signal Malfunction P0568 Cruise Control Set Signal Malfunction P0569 Cruise Control Coast Signal Malfunction 60 OBD2 DTC Definitions GENERIC P0570 P0635 Code Definition P0570 Cruise Control Accel Signal Malfunction P0571 Cruise Control Brake Switch A Circuit Malfunction P0572 Cruise Control Brake Switch A Circuit Low P0573 Cruise Control Brake Switch A Circuit High P0574 Cruise Control System Vehicle Speed Too High P0575 Cruise Control Input Circuit P0576 Cruise Control Input Circuit Low P0577 Cruise Control Input Circuit High P0578 Reserved for Cruise Control Codes P0580 P0600 Serial Communication Link Malfunction P0601 Internal Control Module Memory Check Sum Error P0602 Control Module Programming Error P0603 Internal Control Module Keep Alive Memory KAM Error P0604 Internal Control Module Random Access Memory RAM Error P0605 Internal Control Module Read Only Memory ROM Error P0606 PCM Processor Fa
100. re in an emissions related component or system the computer s internal diagnostic program assigns a diagnostic trouble code DTC that points to the system and subsystem where the fault was found The diagnostic program saves the code in the computer s memory It records a Freeze Frame of conditions present when the fault was found and lights the Malfunction Indicator Lamp MIL Some faults require detection for two trips in a row before the MIL is turned on 36 OBD2 Learning More DIAGNOSTIC TROUBLE CODES DTCs The Malfunction Indicator Lamp MIL is the accepted term used to describe the lamp on the dashboard that lights to warn the driver that an emissions related fault has been found Some manufacturers may still call this lamp a Check Engine or Service Engine Soon light There are two types of DTCs used for emissions related faults Type A and Type B Type A codes are One Trip codes Type B DTCs are usually Two Trip DTCs When a Type A DTC is found on the First Trip the following events take place m The computer commands the MIL On when the failure is first found m f the failure causes a severe misfire that may cause damage to the catalytic converter the MIL flashes once per second The MIL continues to flash as long as the condition exists If the condition that caused the MIL to flash is no longer present the MIL will light steady On m A DTC is saved in the computer s memo
101. rument damage and or damage to your vehicle do not use Code Reader before reading this manual This manual describes common test procedures used by experienced service technicians Many test procedures require precautions to avoid accidents that can result in personal injury and or damage to your vehicle or test equipment Always read your vehicle s service manual and follow its safety precautions before and during any test or service procedure ALWAYS observe the following general safety precautions When an engine is running it produces carbon monoxide a toxic and poisonous gas To prevent serious injury or death from carbon monoxide poisoning operate the vehicle ONLY in a well ventilated area To protect your eyes from propelled objects as well as hot or caustic liquids always wear approved safety eye protection When an engine is running many parts such as the coolant fan pulleys fan belt etc turn at high speed To avoid serious injury always be aware of moving parts Keep a safe distance from these parts as well as other potentially moving objects Engine parts become very hot when the engine is running To prevent severe burns avoid contact with hot engine parts Before starting an engine for testing or trouble shooting make sure the parking brake is engaged Put the transmission in park for automatic transmission or neutral for manual transmission Block the drive wheels with suitable blocks Con
102. ry for later retrieval W A Freeze Frame of the conditions present in the engine or emissions system when the MIL was ordered On is saved in the computer s memory for later retrieval This information shows fuel system status closed loop or open loop engine load coolant temperature fuel trim value MAP vacuum engine RPM and DTC priority When a Type B DTC is found on the First Trip the following events take place m The computer sets a Pending DTC but the MIL is not ordered On Freeze Frame data is not recorded at this time The Pending DTC is saved in the computer s memory for later retrieval m f the failure is found on the second consecutive trip the MIL is ordered On Freeze Frame data is saved in the computer s memory m f the failure is not found on the second Trip the Pending DTC is erased from the computer s memory The MIL will stay lit for both Type A and Type B codes until one of the following conditions occurs m f the conditions that caused the MIL to light are no longer present for the next three trips in a row the computer automatically turns the MIL Off if no other emissions related faults are present However the DTCs remain in the computer s memory for 40 warm up cycles 80 warm up cycles for fuel and misfire faults The DTCs are automatically erased if the fault that caused them to be set is not detected again during that period OBD2 37 Learning More e Jp e EKo
103. rysler lusus 67 Manufacturer Specific Codes Ford 2 005 70 Manufacturer Specific Codes General Motors 83 Manufacturer Specific Codes Honda 93 Manufacturer Specific Codes Toyota 0005 95 GLOSSARY InthOdUCHON ion p y ERG eruere Per ame ERST EU ERYS 97 Glossary of Terms and Abbreviations 97 WARRANTY AND SERVICING Limited One Year Warranty 0 00 cece eee eee eee 99 Service Procedures 0 cece eee eee eee eee 99 i OBD2 Introduction CONGRATULATIONS CONGRATULATIONS on your choice of OBD 2 Code Reader This I powerful tool will help you take charge of your N LL vehicle s maintenance and servicing needs tm yp Today s vehicles use Computer Control Systems to ensure peak per formance and fuel efficiency while reducing pollutants in SOON the vehicle s emissions These systems also have the ability to perform self testing and diagnostics on various vehicle systems and components and provide valuable information to aid in servicing and repair However these sophisticated systems often required expensive tools and test equipment in order to retrieve this information Until now consumers had to rely on professional service technicians to maintain their vehicles in top condition OBD 2 Code Reader brings the power of the technician into your hands in a cost effective easy to use packa
104. so have rights which vary from state to state This manual is copyrighted with all rights reserved No portion of this document may be copied or reproduced by any means without the express written permission of the Manufacturer THIS WARRANTY IS NOT TRANSFERABLE For service send via U P S if possible prepaid to Manufacturer Allow 3 4 weeks for service repair SERVICE PROCEDURES If you have any questions require technical support or information on UPDATES and OPTIONAL ACCESSORIES please contact your local store distributor or the Service Center USA amp Canada 800 544 4124 6 00 AM 6 00 PM Monday Friday PST All others 714 241 6802 6 00 AM 6 00 PM Monday Friday PST FAX 714 432 7511 24 hr Web www CanOBD2 com OBD2 99 AS ECE WE EMPLOY TECHNICIANS CERTIFIED BY ASE ONLY LET US SHOW YOU THEIR CREDENTIALS www CanOBD2 com INNOVA Innova Electronics Corp 17291 Mt Herrmann Street Fountain Valley CA 92708 Instruction MRP 493 0068 Rev A
105. sor Bank 1 P0426 Catalyst Temperature Sensor Range Performance Bank 1 P0427 Catalyst Temperature Sensor Low Input Bank 1 P0428 Catalyst Temperature Sensor High Input Bank 1 P0429 Catalyst Heater Control Circuit Bank 1 P0430 Catalyst System Efficiency Below Threshold Bank 2 P0431 Warm Up Catalyst Efficiency Below Threshold Bank 2 P0432 Main Catalyst Efficiency Below Threshold Bank 2 P0433 Heated Catalyst Efficiency Below Threshold Bank 2 P0434 Heated Catalyst Temperature Below Threshold Bank 2 P0435 Catalyst Temperature Sensor Bank 2 P0436 Catalyst Temperature Sensor Range Performance Bank 2 P0437 Catalyst Temperature Sensor Low Input Bank 2 P0438 Catalyst Temperature Sensor High Input Bank 2 P0439 Catalyst Heater Control Circuit Bank 2 P0440 Evaporative Emission Control System Malfunction P0441 Evaporative Emission Control System Incorrect Purge Flow P0442 Evaporative Emission Control System Leak Detected small leak P0443 Evaporative Emission Control System Purge Control Valve Circuit Malfunction P0444 Evaporative Emission Control System Purge Control Valve Circuit Open P0445 Evaporative Emission Control System Purge Control Valve Circuit Shorted OBD2 57 DTC Definitions GENERIC P0446 P0473 Code Definition P0446 Evaporative Emission Control
106. st information in the computer s memory to see if it makes sense under the current operating conditions Example The signal from the throttle position sensor indicates the vehicle is in a wide open throttle condition but the vehicle is really at idle and the idle condition is confirmed by the signals from all other sensors Based on the input data the computer determines that the signal from the throttle position sensor is not rational does not make sense when compared to the other inputs In this case the signal would fail the rationality test The CCM may be either a One Trip or a Two Trip Monitor depending on the component Fuel System Monitor This Monitor uses a Fuel System Correction program called Fuel Trim inside the on board computer Fuel Trim is a set of positive and negative values that represent adding or subtracting fuel from the engine This program is used to correct for a lean too much air not enough fuel or rich too much fuel not enough air air fuel mixture The program is designed to add or subtract fuel as needed up to a certain percent If the correction needed is too large and exceeds the time and percent allowed by the program a fault is indicated by the computer The Fuel System Monitor may be a One Trip or Two Trip Monitor depending on the severity of the problem 39 Learning More OBD 2 MONITORS m Misfire Monitor This Monitor continuously checks for engine misfires A misfire
107. st standards One of the tests instituted by the Federal Government is called I M 240 On I M 240 the vehicle under test is driven under different speeds and load conditions on a dynamometer for 240 seconds while the vehicle s emissions are measured Emissions tests vary depending on the geographic or regional area in which the vehicle is registered If the vehicle is registered in a highly urbanized area the I M 240 is probably the type of test required If the vehicle is registered in a rural area the stricter dynamometer type test may not be required I M Readiness Monitors 22 I M Readiness shows whether the various emissions related systems on the vehicle are operating properly and are ready for Inspection and Maintenance testing State and Federal Governments enacted Regulations Procedures and Emission Standards to ensure that all emissions related components and systems are continuously or periodically monitored tested and diagnosed whenever the vehicle is in operation It also requires vehicle manufacturers to automatically detect and report any problems or faults that may increase the vehicle s emissions to an unacceptable level The vehicle s emissions control system consists of several components or sub systems Oxygen Sensor Catalytic Converter EGR Fuel System etc that aid in reducing vehicle emissions To have an efficient Vehicle Emission Control System all the emissions related components and systems mus
108. t this time The Code Reader will not turn On when disconnected from a vehicle if the batteries go dead OBD 2 7 About Code Reader CONTROLS AND INDICATORS CONTROLS AND INDICATORS Figure 1 Controls and Indicators See Figure 1 for the locations of items 1 through 9 below 1 ERASE button Erases Diagnostic Trouble Codes DTCs and Freeze Frame data from your vehicle s computer and resets Monitor status 2 SCROLL button Scrolls the LCD display to view DTCs when more than one DTC is present 3 I LINK button Links Code Reader with the vehicle s PCM to retrieve DTCs from the computer s memory and to view I M Readiness Monitor status 4 POWER button Turns Code Reader On and Off 5 Y GREEN LED Indicates that all engine systems are running normally all Monitors on the vehicle are active and performing their diagnostic testing and no DTCs are present 6 YELLOW LED Indicates there is a possible problem A Pending DTC is present and or some of the vehicle s emission monitors have not run their diagnostic testing 7 X RED LED Indicates there is a problem in one or more of the vehicle s systems The red LED is also used to show that DTC s are present DTCs are shown on Code Reader s LCD display In this case the Multifunction Indicator Check Engine lamp on the vehicle s instrument panel will light steady on 8 OBD2 8 9 10 About Code Reader DISPL
109. t what makes OBD 2 unique is its universal application for all late model cars and trucks domestic and import This sophisticated program in the vehicle s main computer system is designed to detect failures in a range of systems and can be accessed through a universal OBD 2 port which is usually found under the dashboard For all OBD systems if a problem is found the computer turns on the CHECK ENGINE light to warn the driver and sets a Diagnostic Trouble Code DTC to identify where the problem occurred A special diagnostic tool such as OBD 2 Code Reader is required to retrieve these codes which consumers and professionals use as a starting point for repairs To learn more about vehicle Computer Control Systems and OBD 2 see COMPUTER ENGINE CONTROLS on page 29 2 OBD 2 You Can Do It EASY TO USE EASY TO VIEW EASY TO DEFINE Easy To Use m Connect Code Reader to the vehicle s test connector m Turn the ignition key On m DONOT start the engine W Code Reader turns On and LINKs automatically Easy To View m Code Reader retrieves stored codes and displays I M Readiness status m Codes are displayed on Code Reader s LCD display screen I M Readiness status is displayed by LED indicators Easy To Define m Locate fault code s in the Fault Code Definition list OBD2 3 Safety Precautions SAFETY FIRST SAFETY FIRST To avoid personal injury inst
110. t work correctly whenever the vehicle is in operation To comply with State and Federal Government regulations vehicle manufacturers designed a series of special computer programs called Monitors that are programmed into the vehicle s computer Each of these Monitors is specifically designed to run tests and diagnostics on a specific emissions related component or system Oxygen Sensor Catalytic Converter EGR Valve Fuel System etc to ensure their proper operation Currently there are a maximum of eleven Monitors available for use OBD2 Using Code Reader I M READINESS TESTING To learn more about Emissions Inspection and Maintenance M Readiness Monitors see OBD 2 MONITORS on page 38 Each Monitor has a specific function to test and diagnose only its designated emissions related component or system The names of the Monitors Oxygen Sensor Monitor Catalyst Monitor EGR Monitor Misfire Monitor etc describe which component or system each Monitor is designed to test and diagnose Emissions Inspection and Maintenance I M Readiness Monitor Status Information I M Readiness Monitor Status shows which of the vehicle s Monitors have run and completed their diagnosis and testing and which ones have not yet run and completed testing and diagnosis of their designated sections of the vehicle s emissions system m f a Monitor was able to meet all the conditions required to enable it to perform the self diagnosis
111. talytic converter The main difference is that a heater is added to bring the catalytic converter to its operating temperature more quickly This helps reduce emissions by reducing the converter s down time when the engine is cold The Heated Catalyst Monitor performs the same diagnostic tests as the catalyst Monitor and also tests the catalytic converter s heater for proper operation This Monitor is also a Two Trip Monitor Exhaust Gas Recirculation EGR Monitor The Exhaust Gas Recirculation EGR system helps reduce the formation of Oxides of Nitrogen during combustion Temperatures above 2500 F cause nitrogen and oxygen to combine and form Oxides of Nitrogen in the combustion chamber To reduce the formation of Oxides of Nitrogen combustion temperatures must be kept below 2500 F The EGR System recirculates small amounts of exhaust gas back into the intake manifold where it is mixed with the incoming air fuel mixture This reduces combustion temperatures by up to 500 F The computer determines when for how long and how much exhaust gas is recirculated back to the intake manifold The EGR Monitor performs EGR system function tests at preset times during vehicle operation The EGR Monitor is a Two Trip Monitor If a fault is found on the first trip the computer temporarily saves the fault in its memory as a Pending Code The computer does not command the MIL on at this time If the fault is sensed again on the second trip the compu
112. ter commands the MIL On and saves the code in its long term memory Evaporative System EVAP Monitor OBD 2 vehicles are equipped with a fuel Evaporative system EVAP that helps prevent fuel vapors from evaporating into the air The EVAP system carries fumes from the fuel tank to the engine where they are burned during combustion The EVAP system may consist of a charcoal canister fuel tank cap purge solenoid vent solenoid flow monitor leak detector and connecting tubes lines and hoses Fumes are carried from the fuel tank to the charcoal canister by hoses or tubes The fumes are stored in the charcoal canister The computer controls the flow of fuel vapors from the charcoal canister to the engine via a purge solenoid The computer energizes or de energizes the purge solenoid depending on solenoid design The purge solenoid opens a valve to allow engine vacuum to draw the fuel vapors from the canister into the engine where the vapors are burned The EVAP Monitor checks for proper fuel vapor flow to the engine and pressurizes the system to test for leaks The computer runs this Monitor once per trip The EVAP Monitor is a Two Trip Monitor If a fault is found on the first trip the computer temporarily saves the fault in its memory as a Pending Code The computer does not command the MIL on at this time If the fault is sensed again on the second trip the PCM com mands the MIL On and saves the code in its long term memory
113. their diagnostic testing m Warm up Cycle Vehicle operation after an engine off period where engine temperature rises at least 40 F 22 C from its temperature before starting and reaches at least 160 F 70 C The PCM uses warm up cycles as a counter to automatically erase a specific code and related data from its memory When no faults related to the original problem are detected within a specified number of warm up cycles the code is erased automatically DIAGNOSTIC TROUBLE CODES DTCs Diagnostic Trouble Codes DTCs are meant to guide you to the proper Diagnostic Trouble service procedure in the vehicle s Codes DTCs are codes service manual DO NOT replace that identify a specific parts based only on DTCs without first problem area consulting the vehicle s service manual for proper testing procedures for that particular system circuit or component DTCs are alphanumeric codes that are used to identify a problem that is present in any of the systems that are monitored by the on board computer PCM Each trouble code has an assigned message that identifies the circuit component or system area where the problem was found OBD 2 diagnostic trouble codes are made up of five characters m The 1st character is a letter It identifies the main system where the fault occurred Body Chassis Powertrain or Network m The 2nd character is a numeric digit It identifies the type of code Generic or Manufacturer S
114. tion Diagnostic Monitor Input Circuit P1352 Ignition Coil A Primary Circuit P1353 Ignition Coil B Primary Circuit P1354 Ignition Coil C Primary Circuit P1355 Ignition Coil D Primary Circuit P1356 Ignition Diagnostic Monitor Indicates Engine Not Turning P1357 Ignition Diagnostic Monitor Pulsewidth Not Defined P1358 Ignition Diagnostic Monitor Signal Out Of Self Test Range no CPU OK P1359 Spark Output Circuit P1360 Ignition Coil A Secondary Circuit P1361 Ignition Coil B Secondary Circuit P1362 Ignition Coil C Secondary Circuit P1363 Ignition Coil D Secondary Circuit P1364 Ignition Coil Primary Circuit P1365 Ignition Coil Secondary Circuit P1366 Ignition Spare P1367 Ignition Spare P1368 Ignition Spare P1369 Engine Temperature Light Circuit P1380 Camshaft Position Actuator Circuit Bank 1 P1381 Camshaft Position Timing Over Advanced Bank 1 P1383 Camshaft Position Timing Over Retarded Bank 1 P1385 Camshaft Position Actuator Circuit Bank 2 P1386 Camshaft Position Timing Over Advanced Bank 2 P1388 Camshaft Position Timing Over Retarded Bank 2 P1390 Octane Adjust Service Pin In Use Circuit Open P1400 Differential Pressure Feedback EGR Circuit Low Input OBD2 75 DTC Definitions FORD P1401 P1469 Code Definition P1401 Differential Pressure
115. to that fault About Code Reader DISPLAY FUNCTIONS 10 9 FREEZE FRAME icon Indicates that there is Freeze Frame data from Priority Code Code 1 stored in the vehicle s computer memory MIL icon Indicates the status of the Malfunction Indicator Lamp MIL The MIL icon is visible only when a DTC has commanded the MIL on the vehicle s dashboard to light Code Number Sequence Code Reader assigns a sequence number to each DTC that is present in the computer s memory starting with 01 This helps keep track of the number of DTCs present in the computer s memory Code number 01 is always the highest priority code and the one for which Freeze Frame data has been stored If 01 is a Pending code Freeze Frame data may or may not be stored in the vehicle s computer memory CODE icon Identifies the Code Number Sequence display area 10 Pending icon Indicates the currently displayed DTC is a Pending code 11 Monitor icons Indicates which Monitors are supported by the vehicle under test and whether or not the associated Monitor has run its diagnostic testing Monitor status When a Monitor icon is solid it indicates that the associated Monitor has completed its diagnostic testing When a Monitor icon is flashing it indicates that the vehicle supports the associated Monitor but the Monitor has not yet run its diagnostic testing OBD2 About Code Reader DISPLAY FUNCTI
116. uccessfully connected to the vehicle s DLC the Code Reader automatically turns On and establishes com munication with the vehicle s computer The word rEAd will show on the LCD display Proceed to step 4 OBD2 17 Using Code Reader CODE RETRIEVAL PROCEDURE m f the Code Reader does not turn on automatically when connected to the vehicle it indicates that there is no power at the vehicle s DLC Check your fuse panel and replace any burned out fuses If replacing the fuse s does not correct the problem consult your vehicle s repair manual to locate the proper computer PCM fuse circuit Perform any necessary repairs before continuing 4 Turn the ignition on DO NOT start the engine e If the ignition key is not turned 4 ON within 10 seconds after the Code Reader is connected Y to a vehicle an Error mes sage will show on the Code Reader s LCD display At times an error message may display after you turn the ignition key on If this happens E r f n r wait for the Code Reader to automatically re link to the vehicle s computer 1 M MONITOR STATUS PENDING 1 m After 10 60 seconds the Code E x Reader will retrieve and display any diagnostic information trouble Ph codes Monitor status stored in the vehicle s computer memory m f the Code Reader does not retrieve vehicle diagnostic information and keeps cycling between rEAd and Error on the LCD display it indicates that th
117. uipment Scan Tools Code Readers etc and the vehicle s on board computer OBD 2 Terminology Th e following terms and their definitions are related to OBD 2 systems Read and reference this list as needed to aid in the understanding of OBD 2 systems Powertrain Control Module PCM The PCM is the OBD 2 accepted term for the vehicle s on board computer In addition to controlling the engine management and emissions systems the PCM also participates in controlling the powertrain transmission operation Most PCMs also have the ability to communicate with other computers on the vehicle ABS ride control body etc Monitor Monitors are diagnostic routines programmed into the PCM The PCM utilizes these programs to run diagnostic tests and to monitor operation of the vehicle s emissions related components or systems to ensure they are operating correctly and within the vehicle s manufacturer specifications Currently up to eleven Monitors are used in OBD 2 systems Additional Monitors will be added as the OBD 2 system is further developed p Not all vehicles support all eleven Monitors OBD2 33 Learning More COMPUTER ENGINE CONTROLS m Enabling Criteria Each Monitor is designed to test and monitor the operation of a specific part of the vehicle s emissions system EGR system oxygen sensor catalytic converter etc A specific set of conditions or driving procedures must be met before the computer ca
118. ult P0607 Control Module Performance P0608 Control Module VSS Output A Malfunction P0609 Control Module VSS Output B Malfunction P0610 Control Module Vehicle Options Error P0615 Starter Relay Circuit P0616 Starter Relay Circuit Low P0617 Starter Relay Circuit High P0618 Alternative Fuel Control Module KAM Error P0619 Alternative Fuel Control Module RAM ROM Error P0620 Generator Control Circuit Malfunction P0621 Generator Lamp L Control Circuit Malfunction P0622 Generator Field F Control Circuit Malfunction P0623 Generator Lamp Control Circuit P0624 Fuel Cap Lamp Control Circuit P0630 VIN Not Programmed or Mismatch ECM PCM P0631 VIN Not Programmed or Mismatch TCM P0635 Power Steering Control Circuit OBD2 61 DTC Definitions GENERIC P0636 P0711 Code Definition P0636 Power Steering Control Circuit Low P0637 Power Steering Control Circuit High P0638 Throttle Actuator Control Range Performance Bank 1 P0639 Throttle Actuator Control Range Performance Bank 2 P0640 Intake Air Heater Control Circuit P0645 A C Clutch Relay Control Circuit P0646 A C Clutch Relay Control Circuit Low P0647 A C Clutch Relay Control Circuit High P0648 Immobilizer Lamp Control Circuit Immobilizer pending SAE J1930 approval P0649 Speed Co
119. ure Control Solenoid A Open Circuit P1747 Pressure Control Solenoid A Short Circuit P1749 Pressure Control Solenoid A Failed Low P1751 Shift Solenoid A Performance P1754 Coast Clutch Solenoid Circuit P1756 Shift Solenoid B Performance P1760 Pressure Control Solenoid A Short Circuit Intermittent P1761 Shift Solenoid C Performance P1762 Overdrive Band Failed Off P1766 Shift Solenoid D Performance P1767 Torque Converter Clutch Circuit P1768 Performance Normal Winter Mode Input P1770 Clutch Solenoid Circuit P1780 Transmission Control Switch O D Cancel Circuit Out Of Self Test Range P1781 4X4L Circuit Out Of Self Test Range P1782 Performance Economy Switch Circuit Out Of Self Test Range P1783 Transmission Overtemperature Condition P1784 Transmission Mechanical Failure First and Reverse P1785 Transmission Mechanical Failure First and Second 80 OBD2 DTC Definitions FORD P1786 P1882 Code Definition P1786 3 2 Downshift Error P1787 2 1 Downshift Error P1788 Pressure Control Solenoid B Open Circuit P1789 Pressure Control Solenoid B Short Circuit P1795 Inconsistent CAN Level P1804 4 Wheel Drive High Indicator Circuit Open or Shorted To Ground P1806 4 Wheel Drive High Indicator Short To Battery P1808 4 Wheel Drive Low Indicator Circuit Open or Short To Ground P1810 4 Wheel Drive Low Indicator Short To Battery P1812 4 Wheel Drive Mode Select Switch Circuit Open P1815 4 Wheel Drive Mode Select
120. ut Circuit 4 0L amp 4 6L P1650 Driver 2 Input Voltage High P1651 Fan On Relay Control Circuit Output Driver Module Quad Driver B Quickset Fault Saturn P1651 Fan 1 Relay Control Circuit P1652 Fan 2 Relay Control Circuit Except Cadillac amp Corvette P1652 VSS Output Circuit 1996 Corvette P1652 Powertrain Induced Chassis Pitch Output Circuit 1997 98 Corvette P1652 Lift Drive Output Circuit Cadillac P1653 TCS Delivered Torque Control Circuit Except Caprice Roadmaster amp 1998 3 8L P1653 Oil Level Lamp Control Circuit Caprice Fleetwood amp Roadmaster P1653 Fuel Level Output Control Circuit 1998 3 8L P1654 A C Relay Control Circuit Except 4 0L amp 4 6L P1654 Cruise Disable Output Circuit 4 0L amp 4 6L P1655 EVAP Purge Solenoid Control Circuit P1656 Wastegate Solenoid Control Circuit P1657 P1660 Skip Shift 1 4 Upshift Cooling Fan Control Circuits P1661 MIL Control Circuit P1662 Speed Control Inhibit Control Circuit P1663 Alternator Lamp Control Circuit Except Caprice Fleetwood amp Roadmaster P1663 Change Oil Lamp Control Circuit Caprice Fleetwood amp Roadmaster 90 OBD 2 DTC Definitions GENERAL MOTORS P1664 P1825 Code Definition P1664 Skip Shift 1 4 Upshift Lamp Control Circuit P1665 DBCM DBTCM Serial Data Circuit 1996 97 P1
121. ut Lower Than Expected P1287 Fuel Pulsewidth In Range But Higher Than Expected P1288 Cylinder Head Temperature Sensor Out Of Self Test Range P1289 Cylinder Head Temperature Sensor Circuit High Input P1290 Cylinder Head Temperature Sensor Circuit Low Input P1291 P1292 Injector High Side Short To GND Or VBATT Bank 1 Injector High Side Short To GND Or VBATT Bank 2 P1293 Injector High Side Open Bank 1 P1294 Injector High Side Open Bank 2 P1295 Injector Multiple Faults Bank 1 P1296 Injector Multiple Faults Bank 2 P1297 Injector High Side Switches Shorted Together P1298 Injector Driver Module Failure P1299 Cylinder Head Overtemperature Protection Active P1300 Boost Calibration Fault P1301 P1302 Boost Calibration High Boost Calibration Low P1303 Exhaust Gas Recirculation Calibration Fault P1304 Exhaust Gas Recirculation Calibration High P1305 Exhaust Gas Recirculation Calibration Low P1306 Kickdown Relay Pull in Circuit 74 OBD 2 DTC Definitions FORD P1307 P1400 Code Definition P1307 Kickdown Relay Hold Circuit P1309 Misfire Monitor AICE Chip Fault Misfire Monitor Disabled P1310 lonization Misfire Detection Module Fault P1311 lonization Misfire Detection Module Communication Fault P1316 IDM Codes Detected P1340 Camshaft Position Sensor B Circuit P1351 Igni
122. zer Key Immobilizer pending SAE J1930 approval P0515 Battery Temperature Sensor Circuit P0516 Battery Temperature Sensor Circuit Low P0517 Battery Temperature Sensor Circuit High OBD2 59 DTC Definitions GENERIC P0520 P0569 Code Definition P0520 Engine Oil Pressure Switch Circuit Malfunction P0521 Engine Oil Pressure Switch Range Performance P0522 Engine Oil Pressure Switch Low Voltage P0523 Engine Oil Pressure Switch High Voltage P0524 Engine Oil Pressure Too Low P0530 A C Refrigerant Pressure Sensor Circuit Malfunction P0531 A C Refrigerant Pressure Sensor Circuit Range Performance P0532 A C Refrigerant Pressure Sensor Circuit Low Input P0533 A C Refrigerant Pressure Sensor Circuit High Input P0534 Air Conditioner Refrigerant Charge Loss P0540 Intake Air Heater Circuit P0541 Intake Air Heater Circuit Low P0542 Intake Air Heater Circuit High P0544 Exhaust Gas Temperature Sensor Circuit Bank 1 P0545 Exhaust Gas Temperature Sensor Circuit Low Bank 1 P0546 Exhaust Gas Temperature Sensor Circuit High Bank 1 P0547 Exhaust Gas Temperature Sensor Circuit Bank 2 P0548 Exhaust Gas Temperature Sensor Circuit Low Bank 2 P0549 Exhaust Gas Temperature Sensor Circuit High Bank 2 P0550 Power Steering Pressure Sensor Circuit Malfunction P0551 Powe

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