Diagnostic Trouble Code (DTC) Root Cause & Remedial Action for ECM 64A/66A/88A Application Engine Tedom GreenTech TG 220 A3V TA 06

Transcription

1 Diagnostic Trouble Code (DTC) Root Cause & Remedial Action for ECM 64A/66A/88A Application Engine Tedom GreenTech TG 220 A3V TA 06 TEDOM a.s., Engines Division, Belgická 4685/15, Jablonec nad Nisou, Czech Republic Tel

2 P0031 Heater Problem in the Oxygen sensor heater control Check oxygen sensor heater Check oxygen sensor heater Check oxygen sensor heater control wire for a shortcircuit to ground. control wire for an open control circuit for a blown fuse. Replace oxygen sensor. Check the oxygen sensor heater P0032 Heater Problem in the Oxygen sensor heater control control wire for a short-circuit to power. Replace oxygen sensor. P0037 Oxygen Sensor 2,Bank 1, Heater Problem in the Oxygen sensor heater control Check oxygen sensor heater Check oxygen sensor heater Check oxygen sensor heater control wire for a shortcircuit to ground. control wire for an open control circuit for a blown fuse. Replace oxygen sensor. Check the oxygen sensor heater P0038 Oxygen Sensor 2,Bank 1, Heater Problem in the Oxygen sensor heater control control wire for a short-circuit to power. Replace oxygen sensor. P0051 Oxygen Sensor 1, Bank 2, Heater Problem in the Oxygen sensor heater control Check oxygen sensor heater Check oxygen sensor heater Check oxygen sensor heater control wire for a shortcircuit to ground. control wire for an open control circuit for a blown fuse. Replace oxygen sensor. Check the oxygen sensor heater P0052 Oxygen Sensor 1, Bank 2, Heater Problem in the Oxygen sensor heater control control wire for a short-circuit to power. Replace oxygen sensor. P0057 Oxygen Sensor 2,Bank 2, Heater Problem in the Oxygen sensor heater control Check oxygen sensor heater Check oxygen sensor heater Check oxygen sensor heater control wire for a shortcircuit to ground. control wire for an open control circuit for a blown fuse. Replace oxygen sensor. Check the oxygen sensor heater P0058 Oxygen Sensor 2, Bank 2, Heater Problem in the Oxygen sensor heater control control wire for a short-circuit to power. Replace oxygen sensor. may indicate a drifted sensor, a contaminated throttle bore, P0068 MAP/MAF/Throttle Position or air leakage after the Correlation throttle. Check for contamination in the throttle bore. Check for air leakage after the throttle. Check the MAP sensor and replace as required. Check the MAF sensor and replace as required. Check the TPS sensor and replace as required. P0093 Large Fuel Rail Leak The fuel rail has a significant leak path either into the engine (injector leakage), or to the atmosphere. Regulator fuel pressure decays Check for leaks at all fittings more than 50% in 45 seconds after key-off with engine running at key-off. and connections between pressure regulator and injector fuel rail. Check for proper installation damage and replace as of injectors in the fuel rail. Check injector o-rings for any required. With the fuel rail installed turn the key on to pressurize the fuel rail and listen for leaks from the injectors. P0094 Small Fuel Rail Leak The fuel rail has a leak path either into the engine (injector leakage), or to the atmosphere. Regulator fuel pressure decays more than 20% but less than Check for leaks at all fittings 50% in 45 seconds after keyoff with engine running at key- pressure regulator and injector and connection between off. fuel rail. Check for proper installation damage and replace as of injectors in the fuel rail. Check injector o-rings for any required. With the fuel rail installed turn the key on so to pressurize the fuel rail and listen for leaks from the injectors. P0102 P0103 Mass Airflow Sensor Mass Airflow Sensor Problem in the MAF sensor signal Problem in the MAF sensor signal Check the electrical connection Check sensor signal circuit to the MAF sensor. for a short-to- ground. Replace MAF sensor Replace MAF sensor

3 Manifold Absolute P0107 Pressure (MAP) Sensor Problem in the MAP sensor Check the electrical connection Check sensor signal circuit for signal to the MAP sensor. a short-to- ground. Replace MAP sensor Manifold Absolute P0108 Pressure (MAP) Sensor Problem in the MAP sensor signal Replace MAP sensor P0112 Intake Air Temperature (IAT) Sensor Problem in the IAT sensor signal Check the sensor signal wire for a short to ground. Replace IAT sensor. P0113 P0117 P0118 Intake Air Temperature (IAT) Sensor Engine Coolant Temperature (ECT) Sensor Engine Coolant Temperature (ECT) Sensor Problem in the IAT sensor signal Problem in the ECT sensor signal Problem in the ECT sensor signal Check the sensor signal wire for Check sensor signal for a an open short circuit to power. Check the sensor signal wire for a short to ground. Replace ECT sensor. Check the sensor signal wire for Check sensor signal for a an open short circuit to power. Replace IAT sensor Replace ECT sensor P0122 P0123 Throttle Position Sensor (TPS) Throttle Position Sensor(TPS) Problem in the TPS sensor signal Problem in the TPS sensor signal Check the electrical connection Check sensor signal circuit for to the TPS sensor. a short-to- ground. Replace TPS sensor Replace TPS sensor The engine has not warmed up to a sufficient temperature and may result in reduced catalytic converter P0125 Insufficient Coolant Temperature for Closed- Loop activity and/or damage to the oxygen sensor due to exhaust condensation. Check thermostat operation. Check ECT sensor part number Check thermostat for correct is correct for vehicle and temperature rating. engine model. P0126 Insufficient Coolant Temperature for Stable Operation The minimum coolant temperature has not been achieved. Check thermostat operation. Check ECT sensor part number Check thermostat for correct is correct for vehicle and temperature rating. engine model. The intake air charge P0127 Intake Air Temperature (IAT) Too temperature is above safe limits for the engine. Check for correct installation of Check for restrictions in the IAT sensor. intake and exhaust system. This diagnostic can be used to determine if the engine coolant thermostat is capable P0128 Thermostat Performance of controlling the engine temperature to a reasonable Engine coolant temperature has not reached 55 degrees C degree (within approximately in 20 minutes of engine 10 degrees C). operation. Check thermostat operation. Check ECT sensor part number Check thermostat for correct is correct for vehicle and temperature rating. engine model. P0129 Barometric Pressure Too Problem in the MAP sensor signal Check the electrical connection Check sensor signal circuit for to the MAP sensor. a short-to- ground. Replace MAP sensor

4 Actions Check Oxygen sensor part P0131 Voltage Oxygen sensor voltage is low Problem in the Oxygen sensor (<0.2V) during a cold soak signal followed by a key- on cycle. Check the electrical connection to the sensor. number with correct version for that vehicle and engine model. Replace Oxygen sensor. Check Oxygen sensor part number with correct version P0132 Voltage Problem in the Oxygen sensor Oxygen sensor voltage is signal above 1.26 volts. Check the sensor signal wire for for that vehicle and engine short to power. model. Replace Oxygen sensor. P0133 Slow Response Response time of the oxygen Problem in the Oxygen sensor sensor is very slow from signal expected. Check Oxygen sensor part number with correct version for that vehicle and engine model. Replace oxygen sensor. P0134 P0182 P0183 Inactivity Fuel Temperature Sensor Fuel Temperature Sensor Problem in the Oxygen sensor signal Problem in the Fuel Temperature sensor signal Problem in the Fuel Temperature sensor signal Oxygen sensor voltage remains between 0.4 and 0.55 volts for an extended period of time. Check Oxygen sensor part number with correct version to for that vehicle and engine the sensor. model. Replace Oxygen sensor. Check the sensor signal wire for Replace Fuel Temperature a short to ground. sensor. Check the sensor signal wire for Check sensor signal for a Replace Fuel Temperature an open short circuit to power. sensor P0192 P0193 Problem in the Fuel Pressure Fuel Pressure Sensor sensor signal Problem in the Fuel Pressure Fuel Pressure Sensor sensor signal Check the electrical connection Check sensor signal circuit to the Fuel Pressure sensor. for a short-to- ground. Replace Fuel Pressure sensor Replace Fuel Pressure sensor Engine coolant temperature P0217 Engine Coolant Over Temperature Condition Problem in the engine cooling system. has exceeded the safe limits of operation. Check coolant level. Check thermostat operation. Check thermostat Check water pump is temperature rating is correct. functioning. Check for blockage in radiator Check for correct cooling fan or hoses. operation. Engine speed has exceeded P0219 Engine Over Speed the safe limits of operation. P0222 P0223 Throttle Position Sensor B Problem in the TPS signal Throttle Position Sensor B Problem in the TPS signal Check the electrical connection Check sensor signal circuit to the TPS. for a short-to- ground. Replace TPS. Replace TPS. P0234 Engine Overboost Condition Problem in the turbocharger wastegate control Check the wastegate & wastegate solenoid plumbing. Check wastegate solenoid operation. Check for proper preload on wastegate can and verify opening pressure is correct. Check if MAP and Boost Pressure Sensor match when P0236 Boost Pressure Sensor Performance Problem with the Boost Pressure Sensor reading. engine stopped - they should both read atmospheric. Replace the sensor which is reading incorrectly. P0237 Problem in the Boost Pressure Boost Pressure Sensor sensor signal Check the electrical connection to the Boost Pressure sensor. Check sensor signal circuit for a short-to- ground. Replace Boost Pressure sensor

5 P0238 Boost Pressure Sensor Problem in the Boost Pressure sensor signal Replace Boost Pressure sensor Check actuator power is P0245 Turbocharger Wastegate Solenoid Circuit Problem with the Wastegate solenoid Check wiring to the wastegate solenoid. available at the wastegate solenoid connector. Check continuity of the solenoid coil. Check actuator power is P0246 Turbocharger Wastegate Solenoid Circuit Problem with the Wastegate solenoid Check wiring to the wastegate solenoid. available at the wastegate solenoid connector. Check continuity of the solenoid coil. j P0261 Injector 1 Circuit Check the electrical connection Check the fuel injector between the ECM and fuel control wire for a short. injector. circuit to ground. Check the fuel injector control Check the fuel injector control Check the resistance across wire for an open circuit for blown fuse. the fuel injector. P0262 Injector 1 Circuit Check the fuel injector control. wire for a short circuit to power. Check the resistance across the fuel injector for a short circuit in the injector coil. Check engine for misfiring on P0263 Cylinder 1 Contribution/Balance Fuel Balance at Limit other cylinders. Follow P0300 troubleshooting procedure Check fuel injector flow and leakage P0264 Injector 2 Circuit Check the electrical connection Check the fuel injector between the ECM and fuel control wire for a short. injector. circuit to ground. Check the fuel injector control Check the fuel injector control Check the resistance across wire for an open circuit for blown fuse. the fuel injector. Check the resistance across P0265 Injector 2 Circuit Check the fuel injector control the fuel injector for a short. wire for a short circuit to power. circuit in the injector coil. Check engine for misfiring on P0266 Cylinder 2 Contribution/Balance Fuel Balance at Limit other cylinders. Follow P0300 troubleshooting procedure Check fuel injector flow and leakage P0267 Injector 3 Circuit Check the electrical connection Check the fuel injector between the ECM and fuel control wire for a short. injector. circuit to ground. Check the fuel injector control Check the fuel injector control Check the resistance across wire for an open circuit for blown fuse. the fuel injector. Check the resistance across P0268 Injector 3 Circuit Check the fuel injector control the fuel injector for a short. wire for a short circuit to power. circuit in the injector coil. Check engine for misfiring on P0269 Cylinder 3 Contribution/Balance Fuel Balance at Limit other cylinders. Follow P0300 troubleshooting procedure Check fuel injector flow and leakage P0270 Injector 4 Circuit Check the electrical connection Check the fuel injector between the ECM and fuel control wire for a short. injector. circuit to ground. Check the fuel injector control Check the fuel injector control Check the resistance across wire for an open circuit for blown fuse. the fuel injector.

6 P0271 Injector 4 Circuit Check the resistance across Check the fuel injector control the fuel injector for a short. wire for a short circuit to power. circuit in the injector coil. Check engine for misfiring on P0272 Cylinder 4 Contribution/Balance Fuel Balance at Limit other cylinders. Follow P0300 troubleshooting procedure Check fuel injector flow and leakage P0273 Injector 5 Circuit Check the electrical connection Check the fuel injector between the ECM and fuel control wire for a short. injector. circuit to ground. Check the fuel injector control Check the fuel injector control Check the resistance across wire for an open circuit for blown fuse. the fuel injector. P0274 Injector 5 Circuit Check the resistance across Check the fuel injector control the fuel injector for a short. wire for a short circuit to power. circuit in the injector coil. Check engine for misfiring on P0275 Cylinder 5 Contribution/Balance Fuel Balance at Limit other cylinders. Follow P0300 troubleshooting procedure Check fuel injector flow and leakage P0276 Injector 6 Circuit Check the electrical connection Check the fuel injector between the ECM and fuel control wire for a short. injector. circuit to ground. Check the fuel injector control Check the fuel injector control Check the resistance across wire for an open circuit for blown fuse. the fuel injector. P0277 Injector 6 Circuit Check the resistance across Check the fuel injector control the fuel injector for a short. wire for a short circuit to power. circuit in the injector coil. Check engine for misfiring on P0278 Cylinder 6 Contribution/Balance Fuel Balance at Limit other cylinders. Follow P0300 troubleshooting procedure Check fuel injector flow and leakage P0279 Injector 7 Circuit Check the electrical connection Check the fuel injector between the ECM and fuel control wire for a short. injector. circuit to ground. Check the fuel injector control Check the fuel injector control Check the resistance across wire for an open circuit for blown fuse. the fuel injector. P0280 Injector 7 Circuit Check the resistance across Check the fuel injector control the fuel injector for a short. wire for a short circuit to power. circuit in the injector coil. Check engine for misfiring on P0281 Cylinder 7 Contribution/Balance Fuel Balance at Limit other cylinders. Follow P0300 troubleshooting procedure Check fuel injector flow and leakage P0282 Injector 8 Circuit Check the electrical connection Check the fuel injector between the ECM and fuel control wire for a short. injector. circuit to ground. Check the fuel injector control Check the fuel injector control Check the resistance across wire for an open circuit for blown fuse. the fuel injector.

7 P0283 Injector 8 Circuit Problem with the fuel injector Problem with the fuel injector. Check the resistance across Check the fuel injector control the fuel injector for a short wire for a short circuit to power. circuit in the injector coil. Check engine for misfiring on P0284 Cylinder 8 Contribution/Balance Fuel Balance at Limit. other cylinders. Follow P0300 troubleshooting procedure Check fuel injector flow and leakage P0297 Vehicle Over Speed Vehicle speed has exceeded the safe limits of operation. Tampering of Road Speed Limiter. Check for signs of tampering on vehicle speed sensor wiring. P0300 Engine Misfire Detected Multiple cylinders appear to be misfiring. Check spark plugs. Check spark plug wires. to fuel injectors. Check engine cylinder compression. Cylinder 1 appears to be P0301 Misfire, Cylinder 1 missing significantly more than other cylinders. Check spark plugs. Check spark plug wires. to fuel injectors. Check engine cylinder compression. Cylinder 2 appears to be P0302 Misfire, Cylinder 2 missing significantly more than other cylinders. Check spark plugs. Check spark plug wires. to fuel injectors. Check engine cylinder compression. Cylinder 3 appears to be P0303 Misfire, Cylinder 3 missing significantly more than other cylinders. Check spark plugs. Check spark plug wires. to fuel injectors. Check engine cylinder compression. Cylinder 4 appears to be P0304 Misfire, Cylinder 4 missing significantly more than other cylinders. Check spark plugs. Check spark plug wires. to fuel injectors. Check engine cylinder compression. Cylinder 5 appears to be P0305 Misfire, Cylinder 5 missing significantly more than other cylinders. Check spark plugs. Check spark plug wires. to fuel injectors. Check engine cylinder compression. Cylinder 6 appears to be P0306 Misfire, Cylinder 6 missing significantly more than other cylinders. Check spark plugs. Check spark plug wires. to fuel injectors. Check engine cylinder compression. Cylinder 7 appears to be P0307 Misfire, Cylinder 7 missing significantly more than other cylinders. Check spark plugs. Check spark plug wires. to fuel injectors. Check engine cylinder compression. Cylinder 8 appears to be P0308 Misfire, Cylinder 8 missing significantly more than other cylinders. Check spark plugs. Check spark plug wires. to fuel injectors. Check engine cylinder compression. If the fuel storage system has a low quantity, this DTC is set P0313 Misfire Detected with Fuel to indicate that the misfire was likely due to operator error. Check fuel storage tank pressure and confirm proper operation. P0314 Single Cylinder Misfire (Cylinder not Specified) Multiple cylinders appear to be misfiring. Check spark plugs. Check spark plug wires. to fuel injectors. Check engine cylinder compression.

8 Idle the engine and lightly tap the engine block with a hammer while monitoring P0327 Knock Sensor 1 Problem with the Knock sensor Check wiring to the knock sensor. the knock channels with a scantool or diagnostic software. Replace the knock sensor. Disconnect the knock sensor, with the engine idling. The knock level P0328 Knock Sensor 1 Problem with the Knock sensor Idle the engine. If there is should be very low (below excessive engine sounds coming 0.05). If it is high, check the from the engine or auxiliary sensor wiring for proper items, repair the engine first. shielding and grounding. Replace the sensor. If no other problems found, replace the ECM. Idle the engine and lightly tap the engine block with a hammer while monitoring the knock channels with a P0332 Knock Sensor 2 Problem with the Knock sensor Check wiring to the knock sensor. scantool or diagnostic software. Replace the knock sensor. Disconnect the knock sensor, with the engine idling. The knock level P0333 Knock Sensor 2 Problem with the Knock sensor Idle the engine. If there is should be very low (below excessive engine sounds coming 0.05). If it is high, check the from the engine or auxiliary sensor wiring for proper items, repair the engine first. shielding and grounding. Replace the sensor. If no other problems found, replace the ECM. P0335 Crankshaft Position (CKP) Sensor Circuit Fault Problem with the CKP At least five CMP transitions and no engine speed signal received to the sensor. Check sensor to trigger wheel gap is correct. Check shield of cables is intact to prevent electrical noise from entering signal. Check resistance of the sensor. Check sensor for damage by removing and inspecting sensing pole. P0340 Camshaft Position (CMP) Sensor Fault Problem with the CMP No CMP signal is received within 60 crankshaft revolutions to the sensor. Check sensor is receiving correct 5V sensor power. Check shield of cables is Check sensor to trigger wheel intact to prevent electrical gap is correct. noise from entering signal. Check resistance of the sensor. Check sensor for damage by removing and inspecting sensing pole. P0363 Misfire Detected - Fuelling Disabled Multiple cylinders appear to be misfiring. Check spark plugs. Check spark plug wires. to fuel injectors. Check cylinder compression. P0462 P0463 Fuel Quantity Sensor Fuel Quantity Sensor Problem in the fuel quantity sensor signal Problem in the fuel quantity sensor signal Check the electrical connection to the fuel quantity sensor. Check sensor signal circuit for a short-to- ground. Replace fuel quantity sensor Replace fuel quantity sensor Check sensor signal circuit P0502 Vehicle Speed Sensor (VSS) Problem in the VSS sensor signal Road speed limiter tampering. Check the electrical connection to the sensor. for a short-to- ground or short to power. Check if speedometer on gauge cluster is operational. Replace sensor.

9 Vehicle Speed Sensor (VSS) "A" Check sensor signal circuit for Intermittent/Erratic/Hi Problem in the VSS sensor Road speed limiter Check the electrical connection a short-to- ground or short to Check if speedometer on P0503 gh signal tampering. to the sensor. power. gauge cluster is operational. Replace sensor. Check IAC functionality by Check for other DTC codes removing IAC and performing related to fuel control, Ignition a Key On/Key Off cycle - IAC Idle Air Control (IAC) IAC is not able to control idle It may be caused by poor fuel control or misfire and correct Check for open circuit should fully extend and retract P0506 System RPM Too speed. control or a sticking IAC. those first. to the IAC motor. between ECM and IAC. to its home position. Replace IAC stepper motor. Check for an air leak after the Check IAC functionality by This may be caused by an air throttle such as any gaskets or removing IAC and performing Idle Air Control (IAC) IAC is not able to control idle leak, a sticking throttle, a sticking throttle cable or a ports on the intake manifold such as vacuum ports, injectors Check for proper throttle opening and closing I.e. no Check throttle stop position Check for a sticking throttle a Key On/Key Off cycle - IAC should fully extend and P0507 System RPM Too speed. sticking IAC. ports, sensor ports etc. sticking of throttle. has not been tampered with. cable. retract to its home position. Replace IAC stepper motor. Idle Air Control (IAC) Check the electrical connection Check electrical circuit for a P0508 Circuit Problem with the IAC to the IAC motor. short-to-ground. Check IAC motor resistance. Replace IAC motor. Idle Speed Control (IAC) Check the control circuit for a Check electrical circuit for P0509 Circuit Problem with the IAC short-to-power. IAC wire-to-wire shorts. Check IAC motor resistance. Replace IAC motor. P0522 P0523 Engine Oil Pressure Sensor Problem in the Oil Pressure sensor signal Engine Oil Pressure Sensor Problem in the Oil Pressure sensor signal Check the electrical connection Check sensor signal circuit for to the Oil Pressure sensor. a short-to- ground. Replace Oil Pressure sensor Replace Oil Pressure sensor P0524 P0545 P0546 Engine Oil Pressure Exhaust Temperature Sensor Exhaust Temperature Sensor Engine oil pressure is to low for safe engine operation. Check engine oil level. Check for clogged oil filter. Verify engine oil pressure. Problem in the Exhaust Temperature sensor signal Check the sensor signal wire for Replace Exhaust a short to ground. Temperature sensor. Problem in the Exhaust Temperature sensor signal Check the sensor signal wire for Check sensor signal for a Replace Exhaust Temperature an open short circuit to power. sensor Check alternator output at a raised engine speed of 1200 RPM. DC voltage should be between 13.5 and 15.0 volts. P0561 System Voltage Unstable Problem with charging system. Charging system voltage is varying excessively. Check all grounds - harness, engine and vehicle. Check battery voltage. AC voltage should be below 1V. Check fluid level of battery. Check for corrosion at battery Check fluid level in battery posts. and correct as required. P0562 System Voltage Problem with charging system. Charging system or battery is unable to maintain a nominal system voltage. Check all grounds - harness, engine and vehicle. Check battery voltage. Check alternator output at a raised engine speed of 1200 RPM. Check fluid level of battery. Check for corrosion at battery Check fluid level in battery posts. and correct as required.

10 This fault indicates that the P0563 System Voltage Problem with charging system. charging system or battery is Check alternator output at a unable to maintain a nominal raised engine speed of 1200 system voltage. RPM. Check all grounds - harness, engine and vehicle. Check fluid level of battery. Check for corrosion at battery posts. Check fluid level in battery and correct as required. Erase the fault code, turn off the ECM for at least fifteen minutes and see if it reappears when the key is turned back on. The time delay is needed to ensure that the ECM uses the stored information from P0603 Keep-Alive Memory Fault There is no saved EEPROM data. EEPROM and not the same data Check electrical circuit for located in temporary memory ECM constant battery (RAM). power. P0604 Internal Control Module Random Access Memory (RAM) Error Problem with ECM RAM. Replace ECM. Internal Control Module P0605 Read Only Memory (ROM) Error Blank or corrupted operating program. Reprogram ECM with correct calibration/firmware file. ECM did not pass functional P0606 ECM Fault test during manufacturing. Boot ROM is corrupt. Replace ECM. P0610 Control Module Vehicle Options Error Vehicle speed limit has not been programmed Factory/dealer speed limit needs to be programmed. Check starter relay function P0616 Starter Relay Circuit A problem with the starter relay control Check for a blown fuse. by turning Key to Start position. The relay should make an audible "click" when active. to relay. Check for low system voltage while engine running at the battery, alternator and ECM actuator power input pin Check for high system P0617 Starter Relay Circuit A problem with the starter relay control Check starter relay function by voltage while engine running turning Key to ON position. The at the battery, alternator relay should make an audible and ECM and power input "click" when active. pin. A discharged battery that requires the alternator to operate at full field may cause this fault. Clear the DTC after P0622 Alternator Field Current Monitor Fault Problem with the vehicle alternator. Check wiring of the signal for open or short circuits. Check alternator for proper operation. Check battery for proper operation. battery is charged and check if DTC reappears.

11 With key-on, verify free motion of the throttle plate by depressing the accelerator pedal slowly then releasing it slowly. The throttle plate will follow the accelerator pedal position. If the throttle makes P0638 Throttle Control Performance Desired and actual throttle positions do not match. strange noises, or sticks, the throttle body assembly should be checked for binding, foreign material, or debris. Ensure that there are no overhanging gaskets, which may occasionally catch the throttle plate. Replace throttle body. Check for shorts in end devices by disconnecting all P0642 Sensor Reference Voltage A Problem with 5 volt sensor power supply at ECM for sensor power supply Check for sensor power supply circuit shorts to ground. sensors using 5 volt sensor power supply and connecting back one at a time. Check for shorts in end devices by disconnecting all P0643 Sensor Reference Voltage A Problem with 5 volt sensor power supply at ECM for sensor power supply Check for sensor power supply circuit shorts to key power or battery power. sensors using 5 volt sensor power supply and connecting back one at a time. Check clutch relay function P0646 A/C Clutch Relay Control Circuit A problem with the AC clutch relay control Check for a blown fuse. by turning AC on. The relay should make an audible "click" when active. to relay. Replace relay. Check clutch relay function by P0647 P0650 A/C Clutch Relay Control A problem with the AC clutch Circuit relay control Malfunction Indicator Lamp (MIL) Circuit Fault Problem with the MIL turning AC relay on with scan tool. The relay should make an audible "click" when active. Check if the rest of the instrument cluster is operational. Check wiring harness and fuses to A/C system. Check wiring connection to lamp. Replace relay. Check for continuity between Check for signal wire short to ECM and lamp connection. ground. Check for shorts in end devices by disconnecting all P0652 Sensor Reference Voltage B Problem with 5 volt sensor power supply at ECM for sensor power supply Check for sensor power supply circuit shorts to ground. sensors using 5 volt sensor power supply and connecting back one at a time.

12 ECM xx DTC Root Cause & Remedial Actions Check for shorts in end devices by disconnecting all P0653 Sensor Reference Voltage B Problem with 5 volt sensor power supply at ECM for sensor power supply Check for sensor power supply circuit shorts to key power or battery power. sensors using 5 volt sensor power supply and connecting back one at a time. Check if the rest of the P0654 P0655 P0656 Problem with engine RPM Engine RPM Output Circuit output/tachometer Engine Stop/Overheat Problem with the Lamp Circuit Fault stop/overheat lamp Fuel Level Output Circuit Problem with the fuel gauge Fault driver instrument cluster is operational. Check if the rest of the instrument cluster is operational. Check if the rest of the instrument cluster is operational. Check wiring connection to gauge. Check wiring connection to lamp. Check wiring connection to gauge. Check for continuity between Check for signal wire short to ECM and gauge connection. j ground. Check for continuity between Check for signal wire short to ECM and lamp connection. ground. Check for continuity between Check for signal wire short to ECM and gauge connection. ground. Replace instrument cluster. Replace instrument cluster. Replace instrument cluster. Check actuator power relay P0658 Actuator Power Voltage The actuator power supply is lower than expected. Check for a blown fuse. function by turning Key to ON position. The relay should make an audible "click" when active. between ECM and relay. Check for low system voltage while engine running at the battery, alternator and ECM actuator power input pin Replace relay. P0659 Actuator Power Voltage The actuator power supply is higher than expected. Check for high system Check for voltage at the Check actuator power relay voltage while engine running injector with engine off. function by turning Key to ON at the battery, alternator and If present, check electrical position. The relay should make ECM actuator power input wiring and relay for proper an audible "click" when active. pin. function. Replace relay. Check power control relay P0686 Power Control Relay Circuit Problem with the power control relay Problem with the power control relay. Check for a blown fuse. function by turning Key to ON position. The relay should make an audible "click" when active. to relay. Check for low system voltage while engine running at the battery, alternator and ECM actuator power input pin P0687 Power Control Relay Circuit Problem with the power control relay Problem with the power control relay. Check power control relay Check for high system function by turning Key to ON voltage while engine running position. The relay should make at the battery, alternator and an audible "click" when active. ECM and power input pin. Replace relay. P0689 ECM/PCM Power Relay Sense Circuit Problem with the power control relay feedback between ECM and relay. Check for shorts circuits to ground. P0690 ECM/PCM Power Relay Sense Circuit Problem with the power control relay feedback between ECM and relay. Check for shorts circuits to power. Check fan control relay function by grounding fan control signal. The relay should make an audible P0691 Fan 1 Relay Control Circuit Problem with the Fan relay control Problem with the Fan control relay. Check for a blown fuse. "click" when active and the Fan should turn on. between ECM and relay. Replace relay.

13 Check fan control relay function by grounding fan control signal. P0692 Fan 1 Relay Control Circuit Problem with the Fan relay control Problem with the Fan control relay. The relay should make an audible "click" when active and the Fan should turn on. Replace relay. Check fan control relay function by grounding fan control signal. The relay should make an audible P0693 Fan 2 Relay Control Circuit Problem with the Fan relay control Problem with the Fan control relay. Check for a blown fuse. "click" when active and the Fan should turn on. between ECM and relay. Replace relay. Check fan control relay function by grounding fan control signal. The relay should make an P0694 Fan 2 Relay Control Circuit Problem with the Fan relay control Problem with the Fan control relay. audible "click" when active and the Fan should turn on. Replace relay. Check for shorts in end devices by disconnecting all P0698 Sensor Reference Voltage C Problem with 5 volt sensor power supply at ECM for sensor power supply Check for sensor power supply circuit shorts to ground. sensors using 5 volt sensor power supply and connecting back one at a time. Check for shorts in end devices by disconnecting all P0699 Sensor Reference Voltage C Problem with 5 volt sensor power supply at ECM for sensor power supply Check for sensor power supply circuit shorts to key power or battery power. sensors using 5 volt sensor power supply and connecting back one at a time. This diagnostic checks the P1134 Erratic Air-Fuel Ratio response time of the lambda sensor to a change in the oxygen sensor voltage. Check for exhaust leaks between the engine and O2 sensor. Check for intake manifold leaks. Check O2 sensor is installed securely. Check integrity of the wiring and electrical connection to the sensor. Check harness grounds. Replace oxygen sensor. This diagnostic checks the P1135 Oxygen Sensor Lean Shift response time of the lambda sensor to a change in the oxygen sensor voltage. Check for exhaust leaks between the engine and O2 sensor. Check for intake manifold leaks. Check O2 sensor is installed securely. Check integrity of the wiring and electrical connection to the sensor. Check harness grounds. Replace oxygen sensor. This diagnostic checks the P1136 Oxygen Sensor Rich Shift response time of the lambda sensor to a change in the oxygen sensor voltage. Check integrity of the wiring and electrical connection to the sensor. Check harness grounds. Replace oxygen sensor. P1137 Oxygen Sensor Impedance Oxygen sensor performance has degraded. Replace Oxygen sensor.

14 P1138 Oxygen Sensor Overheat Condition Oxygen sensor tip temperature has exceeded the safe limit. Check for degraded oxygen sensor. Check for a short circuit in the heater control Check for signs of excessive exhaust temperatures. Replace the sensor. This test attempts to P1131 Oxygen Sensor Impedance Problem with the oxygen sensor signal determine if an oxygen sensor Check integrity of the wiring and has degraded by measuring its electrical connection to the circuit impedance. sensor. Check harness grounds. Replace oxygen sensor. If throttle motion and control P1517 The backup and primary span Backup TPS Data Does Not data differ by an excessive Match amount. Check throttle for proper smooth motion. Check throttle for debris or overhanging gaskets impeding movement. is adequate, perform manual throttle zero process using scan tool. P1518 Unable to Complete Throttle Zero Process ECM was not able to do a throttle span after key- off. Troubleshoot and repair any Troubleshoot and repair any sensor power supply faults first. TPS faults first. Check throttle for proper motion, and for debris or overhanging gaskets using the procedure found in DTC P0638. Check for proper throttle position voltage readings. If throttle motion and control is adequate, perform manual throttle zero process using scan tool and check if DTC reappears. Check battery backup power P1519 No Backup TPS Zero Data Found Only one copy of span data in EEPROM is found when there should be two. This indication is normal on a new ECM installation. Clear DTC's if the throttle is working normally. for proper operation - it must not be disconnected from the battery during ECM power down or throttle span. Check battery backup power P1520 No Primary TPS Zero Data Found Only one copy of span data in EEPROM is found when there should be two. This indication is normal on a new ECM installation. Clear DTC's if the throttle is working normally. for proper operation - it must not be disconnected from the battery during ECM power down or throttle span. Check throttle for proper motion, and for debris or overhanging gaskets using P1521 Throttle Resting Position Incorrect The rest position of throttle does not match expected. Troubleshoot and repair any Troubleshoot and repair any sensor power supply faults first. TPS faults first. the procedure found in DTC P0638. Check for proper throttle position voltage readings. If throttle motion and control is adequate, perform manual throttle zero process using scan tool. Check throttle for proper motion, and for debris or overhanging gaskets using P1522 Throttle Resting Position Incorrect After Span After spanning the resting positions have failed to match. Troubleshoot and repair any Troubleshoot and repair any sensor power supply faults first. TPS faults first. the procedure found in DTC P0638. Check for proper throttle position voltage readings. If throttle motion and control is adequate, perform manual throttle zero process using scan tool.

15 With the throttle motor disconnected, verify throttle P1630 Electronic Throttle Driver Overheat The throttle driver temperature has exceeded the safe operating limits. moves smoothly and without Check the placement of the excessive force required. Check ECM throttle for binding. getting overheated. With the throttle motor disconnected, verify throttle P1631 Electronic Throttle Driver Overheat The throttle driver temperature has exceeded the safe operating limits. moves smoothly and without Check the placement of the excessive force required. Check ECM throttle for binding. getting overheated. With the throttle motor disconnected, verify throttle P1632 Electronic Throttle Driver Overheat Shutdown The throttle driver temperature has exceeded the safe operating limits and. moves smoothly and without Check the placement of the excessive force required. Check ECM throttle for binding. getting overheated. This fault indicates that the charging system or battery has P1633 P1656 Throttle driver indicates that a allowed an overvoltage of over Check alternator output at a Electronic Throttle Driver voltage above 30V has 30 volts to disable the throttle raised engine speed of 1200 Overvoltage Shutdown occurred. driver IC. RPM. Check if the rest of the Problem with the low fuel instrument cluster is Fuel Lamp Circuit Fault lamp operational. Check all grounds - harness, engine and vehicle. Check wiring connection to lamp. Check fluid level of battery. If an incandescent lamp is used replace lamp. Check for corrosion at battery posts. Check for continuity between ECM and lamp connection. Check fluid level in battery and correct as required. Check for signal wire short to ground. Replace instrument cluster. P1690 Maintenance Reminder Fuel use total exceeds a maintenance limit Do scheduled maintenance on fuel system. Check throttle motor for P2100 Throttle Actuator Control Motor Circuit Open Open circuit in throttle control motor circuit detected. Check wiring to throttle motor. continuity. If open, replace throttle body. P2102 Throttle Actuator Control Motor Circuit Short circuit across throttle control motor or to ground. Check wiring to motor. Check motor for short circuits. P2103 Throttle Actuator Control Motor Circuit Short circuit across throttle control motor or to power. Check wiring to motor. Check motor for short circuits. With the throttle motor disconnected, verify throttle moves smoothly and P2111 Throttle Stuck Open Throttle is stuck open and does not move. Check throttle for ice or blockage. without excessive force required. Check throttle for binding. With the throttle motor disconnected, verify throttle moves smoothly and without excessive P2112 Throttle Stuck Closed Throttle is stuck closed and does not move. Check throttle for ice or blockage. force required. Check throttle for binding.

16 P2122 P2123 Accelerator Pedal Position Sensor D Accelerator Pedal Position Sensor D Problem in the APP signa Problem in the APP signa Check the electrical connection Check sensor signal circuit for to the APP. a short-to- ground. Replace accelerator pedal. Replace accelerator pedal. P2127 P2128 Accelerator Pedal Position Sensor E Accelerator Pedal Position Sensor E Problem in the APP signa Problem in the APP signa Check the electrical connection Check sensor signal circuit for to the APP. a short-to- ground. Replace accelerator pedal. Replace accelerator pedal. P2132 P2133 Accelerator Pedal Position Sensor F Accelerator Pedal Position Sensor F Problem in the APP signa Problem in the APP signa Check the electrical connection Check sensor signal circuit for to the APP. a short-to- ground. Replace accelerator pedal. Replace accelerator pedal. Check throttle position sensor P2135 Throttle Position Sensor A- B Correlation Throttle position sensors do not match. voltage while manually moving the throttle plate. Check wiring to throttle body. Replace throttle body. Check throttle position sensor P2138 Accelerator Pedal Position Sensor D-E Correlation Accelerator pedal sensors do not match. voltages while slowly depressing Check wiring to accelerator the accelerator pedal. pedal. Replace accelerator pedal. Check throttle position sensor P2139 Accelerator Pedal Position Sensor D-F Correlation Accelerator pedal sensors do not match. voltages while slowly depressing Check wiring to accelerator the accelerator pedal. pedal. Replace accelerator pedal. Check throttle position sensor P2140 Accelerator Pedal Position Sensor E-F Correlation Accelerator pedal sensors do not match. voltages while slowly depressing Check wiring to accelerator the accelerator pedal. pedal. Replace accelerator pedal. If the adaptive fuel trim in the off-idle region is attempting to P2177 Fuel System Too Lean off- Idle, Bank 1 Problem with closed-loop feedback control. add as much fuel as the programmed maximum value Check for exhaust leaks (typically around 15%), this between the engine and O2 DTC will indicate this problem. sensor. Check for intake manifold leaks. Check O2 sensor is installed securely. Check integrity of the wiring and electrical connection to the sensor. Check pressure setting of the regulator. Check CNG particulate filter and coalescing filter for excess contaminants that may restrict flow. If the adaptive fuel trim in the off-idle region is attempting to subtract as much fuel as the programmed minimum value (typically around - P2178 Fuel System Too Rich off-idle, Bank 1 Problem with closed-loop feedback control. 15%), this DTC will indicate this problem. Check for leaking injector. Check regulator outlet pressure. Check for exhaust restrictions.

17 If the adaptive fuel trim in the idle region is attempting to add as much fuel as the programmed maximum value P2187 Fuel System Too Lean at Idle, Bank 1 Problem with closed-loop feedback control. (typically around 15%), this DTC will indicate this problem. Check for exhaust leaks between the engine and O2 sensor. Check for intake manifold leaks. Check O2 sensor is installed securely. Check integrity of the wiring and electrical connection to the sensor. Check pressure setting of the regulator. Check coalescing filter for oil. Check injectors for proper flow. If the adaptive fuel trim in the idle region is attempting to subtract as much fuel as the programmed minimum value (typically around - 15%), this P2188 Fuel System Too Rich at Idle, Bank 1 Problem with closed-loop feedback control. DTC will indicate this problem. Check for leaking injector. Check regulator outlet pressure. Check for exhaust restrictions. If the adaptive fuel trim in the high-load region is attempting to add as much P2191 Fuel System Too Lean At Load,Bank 1 Problem with closed-loop feedback control. fuel as the programmed maximum value (typically around 15%), this DTC will indicate this problem. Check for exhaust leaks between the engine and O2 sensor. Check for intake manifold leaks. Check O2 sensor is installed securely. Check integrity of the wiring and electrical connection to the sensor. Check pressure setting of the regulator. Check CNG particulate filter and coalescing filter for excess contaminants that may restrict flow. If the adaptive fuel trim in the high-load region is attempting to subtract as much fuel as the P2192 Fuel System Too Rich At Load,Bank 1 Problem with closed-loop feedback control. programmed minimum value (typically around - 15%), this DTC will indicate this problem. Check for leaking injector/ Check regulator outlet pressure. Check for exhaust restrictions. Check for a single cylinder P2195 O2 Sensor Signal Stuck Lean Problem with closed-loop feedback control. If the voltage remains low but still in-range, this DTC will set. Check for exhaust leaks. misfire which would introduce excessive oxygen in the exhaust. Check regulator outlet pressure. If the oxygen sensor signal is P2196 O2 Sensor Signal Stuck Rich Problem with closed-loop feedback control. likely valid but reading rich continually, this DTC will set. Check for leaking injector. Check intake for restrictions such as clogged filter. Check regulator outlet pressure. Check for exhaust restrictions. Oxygen sensor signal voltage P2231 Shorted to Heater toggles when heater control output also toggles. Check wiring to oxygen sensor Replace oxygen sensor. UEGO interface circuit P2243 Oxygen Sensor Reference Circuit, Bank 1,Sensor 1 indicates reference circuit is shorted or overloaded. Check wiring to oxygen sensor Replace oxygen sensor.

18 P2262 P2263 Turbo pressure Boost Pressure - Mechanical Turbo pressure Boost Pressure System Performance No boost pressure detected. Insufficient boost pressure detected. Check boost pressure sensor connection. Check boost pressure sensor connection. Check air ducting for secure connections. Check air ducting for secure connections. Check turbocharger for seizing. Check turbocharger for seizing. P2297 Signal Stuck Rich During Deceleration Some types of contamination Silicone contamination of the or circuit failures can cause oxygen sensor or a leaking the sensor to read rich when injector will cause a rich the fuel is supposed to be off. indication without fuel. Check for leaking injector. Replace O2 sensor. Ensure that any sealants used on the engine are oxygen sensor safe. P2299 P2300 Accelerator Pedal Position and Brake Switch Incompatible Ignition Coil 1 Circuit Primary Current Accelerator pedal depressed while brake pedal is also depressed. Ignition current did not reach 2 amps during dwell-on time. Check operation of accelerator Check for burned out brake pedal. light bulbs. Check the wiring between Check the electrical connection the ECM and the ignition coil. Check operation of brake switch input to the ECM. Check for driver abuse. Check key power voltage. If key power voltage at ECM is lower than voltage at P2301 Ignition Coil 1 Circuit Primary Current Ignition current exceeded 9.5 amps during dwell-on time. Check the electrical connection ignition coil, this DTC will set. Check the wiring between the ECM and the ignition coil. A misfire fault without a P2302 P2303 Ignition Coil 1 Circuit Secondary Fault Ignition Coil 2 Circuit Primary Current No spark detected by the ECM. Ignition current did not reach 2 amps during dwell-on time. corresponding ignition system fault is an indication of this type of problem. Check for disconnected Check for disconnected sparkplug wire at the sparkplug wire at the coil. sparkplug. Check the wiring between Check the electrical connection the ECM and the ignition coil. Check sparkplug wire for continuity. Replace sparkplugs. Check key power voltage. If key power voltage at ECM is lower than voltage at P2304 Ignition Coil 2 Circuit Primary Current Ignition current exceeded 9.5 amps during dwell-on time. Check the electrical connection ignition coil, this DTC will set. Check the wiring between the ECM and the ignition coil. A misfire fault without a P2305 P2306 Ignition Coil 2 Circuit Secondary Fault Ignition Coil 3 Circuit Primary Current corresponding ignition No spark detected by the system fault is an indication ECM. of this type of problem. Ignition current did not reach 2 amps during dwell-on time. Check for disconnected Check for disconnected sparkplug wire at the sparkplug wire at the coil. sparkplug. Check the wiring between Check the electrical connection the ECM and the ignition coil. Check sparkplug wire for continuity. Replace sparkplugs. Check key power voltage. If key power voltage at ECM is lower than voltage at P2307 Ignition Coil 3 Circuit Primary Current Ignition current exceeded 9.5 amps during dwell-on time. Check the electrical connection ignition coil, this DTC will set. Check the wiring between the ECM and the ignition coil.

19 ERR CODE ERR DESC ERR CAUSEl ERR CAUSE2 ERR REMEDY1 ERR REMEDY2 ERR REMEDY3 ERR REMEDY4 ERR REMEDY5 ERR REMEDY6 ERR REMEDY? A misfire fault without a P2308 P2309 Ignition Coil 3 Circuit Secondary Fault Ignition Coil 4 Circuit Primary Current No spark detected by the ECM. Ignition current did not reach 2 amps during dwell-on time. corresponding ignition system fault is an indication of this type of problem. Check for disconnected Check for disconnected sparkplug wire at the sparkplug wire at the coil. sparkplug. Check the wiring between Check the electrical connection the ECM and the ignition coil. Check sparkplug wire for continuity. Replace sparkplugs. J Check key power voltage. If key power voltage at ECM is P2310 Ignition Coil 4 Circuit Primary Current Ignition current exceeded 9.5 amps during dwell-on time. Check the electrical connection lower than voltage at ignition Check the wiring between the coil, this DTC will set. ECM and the ignition coil. j A misfire fault without a P2311 P2312 Ignition Coil 4 Circuit Secondary Fault Ignition Coil 5 Circuit Primary Current No spark detected by the ECM. Ignition current did not reach 2 amps during dwell-on time. corresponding ignition system fault is an indication of this type of problem. Check for disconnected Check for disconnected sparkplug wire at the sparkplug wire at the coil. sparkplug. Check the wiring between Check the electrical connection the ECM and the ignition coil. Check sparkplug wire for continuity. Replace sparkplugs. Check key power voltage. If key power voltage at ECM is P2313 Ignition Coil 5 Circuit Primary Current Ignition current exceeded 9.5 amps during dwell-on time. Check the electrical connection lower than voltage at ignition Check the wiring between the coil, this DTC will set. ECM and the ignition coil. A misfire fault without a P2314 P2315 Ignition Coil 5 Circuit Secondary Fault Ignition Coil 6 Circuit Primary Current No spark detected by the ECM. Ignition current did not reach 2 amps during dwell-on time. corresponding ignition system fault is an indication of this type of problem. Check for disconnected Check for disconnected sparkplug wire at the sparkplug wire at the coil. sparkplug. Check the wiring between Check the electrical connection the ECM and the ignition coil. Check sparkplug wire for continuity. Replace sparkplugs. Check key power voltage. If key power voltage at ECM is P2316 Ignition Coil 6 Circuit Primary Current Ignition current exceeded 9.5 amps during dwell-on time. Check the electrical connection lower than voltage at ignition Check the wiring between the coil, this DTC will set. ECM and the ignition coil. A misfire fault without a P2317 P2318 Ignition Coil 6 Circuit Secondary Fault Ignition Coil 7 Circuit Primary Current No spark detected by the ECM. Ignition current did not reach 2 amps during dwell-on time. corresponding ignition system fault is an indication of this type of problem. Check for disconnected Check for disconnected sparkplug wire at the sparkplug wire at the coil. sparkplug. Check the wiring between Check the electrical connection the ECM and the ignition coil. Check sparkplug wire for continuity. Replace sparkplugs. Check key power voltage. If key power voltage at ECM is P2319 Ignition Coil 7 Circuit Primary Current Ignition current exceeded 9.5 amps during dwell-on time. Check the electrical connection lower than voltage at ignition Check the wiring between the coil, this DTC will set. ECM and the ignition coil.