Chevrolet OBD / OBD2 Codes >> Avalanche – Aveo – Colorado – Impala – Malibu – Prizm – SSR – Trailblazer – Venture

Model

Engine  identification:Year:

System

Avalanche 5.3/6.0/8.1 LVIN  position 8 =  3/0/G/K/T/Y2002-09GM
Aveo 1.6LVIN  position 8 =  62004-09GM
Colorado 2.8/3.5LVIN  position 8 =  8/62004-06GM
Colorado 2.9/3.6/5.7LVIN  position 8 =  9/E/L2007-09GM
Impala 3.4/3.8LVIN  position 8 =  E/K/12000-05GM
Malibu 2.2/2.4/3.5/3.6LVIN  position 8 =  5/7/B/F/N/82004-09GM
Malibu 2.4/3.1 LVIN  position 8 =  J/M/T1997-03GM
Prizm 1.BLVIN  position 8 =  81998-02GM
SSR 5.3/6.0LVIN  position 8 =  H/P2003-07GM
Trailblazer 4.2/5.3/6.0LVIN  position 8 =  H/M/P/S2002-09GM
Venture 3.4LVIN  position 8 =  E1997-04GM

General information

  • Refer to the front of this manual for general test conditions, terminology, detailed descriptions of wiring faults and a general trouble shooter for electrical and mechanical faults.
  • Malfunction indicator lamp (MIL) will illuminate or flash if certain faults are recorded.
  • ECM operates in backup mode if sensors fail , to enable vehicle to be driven to repair shop.

Accessing

  • Trouble codes can only be displayed by using a Scan Tool connected to the data link connector (DLC).

Erasing

  • After the faults have been rectified, the manufacturer recommends that trouble codes are erased by using a Scan Tool connected to the data link connector (DLC).

Trouble code  identification

Scan codeFault locationProbable cause
PO, P2,UORefer to OBO-II trouble code tables
P1101Intake air flow -incorrectWiring, mechanical fault, engine coolant temperature (EeT) sensor, barometric pressure (BARO) sensor, intake air temperature (IAT) sensor, manifold absolute pressure (MAP) sensor, mass air flow (MAF) sensor, throttle position (TP) switch
P1106Manifold absolute pressure (MAP) sensor voltage high, intermittentWiring open circuit/short circuit to positive, poor connections
P1107Manifold absolute pressure (MAP) sensor voltage low, intermittentWiring short circuit to ground, poor connections
P1111Intake air temperature (IAT) sensor -voltage high,intermittentWiring open circuit/short to positive, poor connections
P1112Intake air temperature (IAT) sensor -voltage low,intermittentWiring short circuit to ground
P1114Engine coolant temperature (EeT) sensor voltagelow, intermittentWiring short circuit to ground, poor connections
P1115Engine coolant temperature (EeT) sensor voltage high, intermittentWiring open circuit/short to positive, poor connections
P1116Engine coolant temperature (EeT) sensor circuit malfunctionWiring, ECT sensor, ECM
P1120Throttle motor position sensor 1 -circuitmalfunctionWiring, throttle control module
P1121Throttle position (TP) sensor -voltage high,intermittentWiring open circuit/short to positive, poor connections
P1122Throttle position (TP) sensor -voltage low, intermittentWiring open circuit/short to ground, poor connections
P1125Accelerator pedal position (APP) sensor 1/2/3 -signal malfunctionWiring, APP sensor, ECM
P1133Oxygen sensor (02S)/heated oxygen sensor(H02S) 1, bank 1 -insufficient switchingWiring, exhaust system leaking, 025/H025
P1134Heated oxygen sensor (H02S) 1, bank 1 slow responseWiring, oxygen sensor heater, exhaust system leaking, H025
P1137Heated oxygen sensor (H02S) 2, bank 1 voltage lowWiring, exhaust system leaking, H025
P1138Heated oxygen sensor (H02S) 2, bank 1 voltage highWiring, H025
P1153Heated oxygen sensor (H02S) 1, bank 2insufficient switchingWiring, oxygen sensor heater, exhaust system leaking, H025
P1154Heated oxygen sensor (H02S) 1, bank 2 slow responseWiring, oxygen sensor heater, exhaust system leaking, H025
P1166Heated oxygen sensor (H02S) 2, bank 1 voltage lowWiring, exhaust system leaking, H025
P1171Fuel system -lean during accelerationFuel filter, fuel pump, H025, injectors
P1172Fuel level sensors, primary & secondary sensorno fuel level change during fuel transfer fromsecondary to primary tankWiring, fuel pump relays, secondary fuel pump, fuel level sensors, ECM
P1174Heated oxygen sensor (H02S) 1, bank 1 mixture variation between cylindersIntake/exhaust leak/blockage, mechanical fault,ignition control, H02S
P1175Heated oxygen sensor (H02S) 2, bank 2 mixturevariation between cylindersIntake/exhaust leak/blockage, mechanical fault,ignition control, H02S
P1189Engine oil pressure warning switch -circuitmalfunctionWiring open circuit, engine oil pressure warning switch, ECM
P1200Injectors -circuit malfunctionWiring open circuit/short circuit to ground/short circuit to positive, injectors, ECM
P1220Throttle motor pOSition sensor 2 -circuit malfunctionWiring, throttle control module
P1221Throttle motor position sensor 1/2 -signalvariationWiring, throttle control module
P1255Fuel pump control module -driver over-temperatureFuel pump control module
P1271Accelerator pedal position (APP) sensor 1/2 signal variationWiring, APP sensor, ECM
P1275Accelerator pedal position (APP) sensor 1 circuitmalfunctionWiring, APP sensor, ECM
P1276Accelerator pedal position (APP) sensor 1 rangeperformance. Wiring, APP sensor, ECM
P1280Accelerator pedal position (APP) sensor 2 circuit malfunctionWiring, APP sensor, ECM
P1281Accelerator pedal position (APP) sensor 2 range performanceWiring, APP sensor, ECM
P1285Accelerator pedal position (APP) sensor 3 circuitmalfunctionWiring, APP sensor, ECM
P1286Accelerator pedal pOSition (APP) sensor 3 range performanceWiring, APP sensor, ECM
P1300Ignition coil 1 control -feedback circuit malfunctionWiring, ignition coil 1, ECM
P1305Ignition coil 2 control -feedback circuitmalfunctionWiring, ignition coil 2, ECM
P1310Ignition coil 3 control -feedback circuitmalfunctionWiring, ignition coil 3, ECM
P1315Ignition coil 4 control -feedback circuitmalfunctionWiring, ignition coil 4, ECM
P1335Crankshaft position (CKP) sensor -circuit malfunctionWiring, CKP sensor, ECM
P1336Crankshaft position (CKP) sensor -variation notlearnedLearning procedure not performed
P1345Crankshaft position (CKP) sensor/camshaftposition (CMP) sensor -signal variationCKP sensor, distributor/camshaft alignment, mechanical fault
P1346Camshaft position actuator -circuit malfunctionWiring, mechanical fault, camshaft position actuator, ECM
P1349Camshaft position actuator -circuit malfunctionWiring, mechanical fault, camshaft position actuator, ECM
P1350Ignition control system, bypass circuit -circuit malfunctionWiring, poor connections, ICM, ECM
P1351Ignition control system, coil -voltage highWiring open circuit, ICM, ECM
P1351Ignition control module (ICM) -ignition coil 1circuit voltage highWiring open circuit/short circuit to ground/ short circuit to positive, ICM, ECM
P1352 0Ignition control system, bypass circuit voltage highWiring open circuit, ICM, ECM
P1352Ignition control module (ICM) -ignition coil 2 circuit voltage highWiring open circuit/short circuit to ground/short circuit to positive, ICM, ECM
P1353Ignition control module (ICM) -ignition coil 3circuit voltage highWiring open circuit/short circuit to ground/short circuit to positive, ICM, ECM
P1361Ignition control system, ignition control (IC) circuit -voltage lowWiring, circuit short circuit to ground, poor connections, ICM, ECM
P1361Ignition control module (ICM) -ignition coil 1 circuit voltage lowWiring short circuit to ground/positive, bypass circuit short circuit to ground, ICM, ECM
P1362Ignition control, bypass circuit -voltage lowWiring short circuit to ground, ICM, ECM
P1362Ignition control module (ICM) -ignition coil 2circuit voltage lowWiring short circuit to ground/positive, bypass circuit short circuit to ground, ICM, ECM
P1363Ignition control module (ICM) -ignition coil 3 circuit voltage lowWiring short circuit to ground/positive, bypass circuit short circuit to ground, ICM, ECM
P1374Crankshaft position (CKP) sensor, high to low resolution frequency -signal variationWiring, wiring routed near spark plug wires, ignition coils arcing/tracking, ICM, ECM
P1380Antilock brake system (ABS)/traction control system (TCS), rough road signal to engine control module (ECM) -malfunctionABS trouble code(s) stored
P1381Antilock brake system (ABS)/traction control system (TCS), rough road signal to engine control module (ECM) -no communicationWiring, poor connections, ASS
P1391Rough road sensor -signal malfunctionWiring, rough road sensor, ECM
P1392Rough road sensor -voltage lowWiring, rough road sensor, ECM
P1393Rough road sensor -voltage highWiring, rough road sensor, ECM
P1396Rough road sensor -signal malfunctionWiring, rough road sensor, wheel speed sensor, ECM
P1397Rough road sensor -signal malfunctionWiring, rough road sensor, wheel speed sensor, ABS control module
P1400Cold start emission control -malfunctionIntake/exhaust leak/blockage, mechanical fault, idle speed control (ISC) system, ignition control, engine coolant temperature (ECT) sensor, H02S
P1404Exhaust gas recirculation (EGR) valve not fully closingWiring, poor connections, EGR valve position sensor, EGR solenoid
P1406Exhaust gas recirculation (EGR) valve position sensor range performanceWiring, EGR valve tight/sticking, EGR valve position sensor
P1441Evaporative emission (EVAP) system -leakdetectedHose connection(s), EVAP canister, EVAP canister purge valve
P1442Evaporative emission (EVAP) system vacuumswitch -circuit malfunctionHoses blockedlleaking, wiring, EVAP canister, ECM
P1483Engine cooling system -performanceCooling system, ECT sensor, IAT sensor
P1512Throttle control unit -signal variationWiring, throttle control unit, ECM
P1514Throttle control unit, intake air flow -excessiveThrottle control unit, MAP sensor, CMP sensor signal, ECM
P1515Throttle command/actual throttle position -signalvariationWiring, throttle valve sticking, throttle control module
P1516Throttle command/actual throttle position -signal variationWiring, throttle valve sticking, throttle control module
P1517Throttle control module -malfunctionThrottle control module
P1518Throttle control. module/engine control module(ECM) -communication malfunctionWiring, throttle control module, ECM
P1520Stoplamp switch -circuit malfunctionWiring short to voltage, stoplamp switch, ECM
P1523Throttle control unit, closed throttle position -performanceThrottle valve movement restricted, throttle control unit
P1546AlC compressor clutch relay -circuit malfunctionWiring, AlC compressor clutch relay, ECM
P1554Cruise control status circuit -high voltageWiring open circuit/short circuit to ground, cruise control module, ECM
P1571Traction control system (TCS), torque request signal -malfunctionWiring, poor connections, ABS/TCS
P1573Engine control module (ECM), anti lock brake system (ABS)/traction control system (TCS)communication -malfunctionWiring, poor connections, ABS control module, ECM
P1585Cruise control , inhibit output circuit -voltage out of rangeWiring, cruise control module, ECM
P1600Engine control module (ECM) -malfunctionECM
P1600Engine control module (ECM) -supply voltageWiring, ECM
P1601CAN data bus, engine control module (ECM)/antilock brake system (ABS)/tractioncontrol system (TCS)linstrumentation control module/diagnostic control module some communication lostWiring, poor connections, ECM, ABS/TCS, diagnostic control module, instrumentation control module
P1602Engine control module (ECM) to antilock brake system (ABS)/traction control system (TCS),CAN data bus -communication failureWiring, poor connections, ABS control module
P1604CAN data bus -instrument panelWiring, BCM trouble code(s) stored
P1605CAN data bus -AlCWiring, AlC system trouble code(s) stored
P1610CAN data bus -body control module (SCM)Wiring, BCM trouble code(s) stored
P161BThrottle motor control module -performanceECM, transmission, AlC compressor, manifold absolute pressure (MAP) sensor hose
P1621Engine control module (ECM) -malfunctionECM
P1626Engine control module (ECM) -fuel enable signal lostWiring, poor connections, immobilizer control module, ECM
P1627Engine control module (ECM) -malfunctionECM
P1629Engine control module (ECM) -fuel enable signal not receivedIncorrect ignition key, wiring, poor connections, immobilizer control module, ECM
P1630Engine control module (ECM), immobilizer code -learning modeECM immobilizer code programming notcompleted
P1631Engine control module (ECM) -incorrectimmobilizer codeIncorrect key, immobilizer code not programmed
P1632Engine control module (ECM) -fuel disable signal receivedFuses, BCM, immobilizer code
P1633Engine control module (ECM), ignition supply voltageFuse, wiring open circuit, ECM
P1634Engine control module (ECM), ignition supply voltageFuse, wiring open circuit, ECM
P1635Engine control module (ECM), sensor supply voltage -circuit malfunctionWiring, poor connections, TP sensor, MAPsensor, EGR valve position sensor, FTP sensor, ECM
P1637Alternator ‘L’ terminal -circuit malfunctionWiring open circuit/short circuit to ground,alternator, battery temperature sensor, ECM
P1638Alternator ‘F’ terminal -circuit malfunctionWiring open circuit/short circuit to ground,alternator, ECM
P1639Engine control module (ECM), sensor supply voltage -circuit malfunctionWiring, poor connections, AlC refrigerant pressure sensor, ECM
P1639Engine control module (ECM), sensor supply voltage -circuit malfunctionWiring, poor connections, FTP sensor, AlCrefrigerant pressure sensor, ECM
P1639Engine control module (ECM), sensor supply voltage -circuit malfunctionWiring, poor connections, FTP sensor, throttle position (TP) sensor, ECM
P1639Engine control module (ECM), sensor supply voltage -circuit malfunctionWiring, poor connections, MAP sensor sensor, throttle position (TP) sensor 2, accelerator pedalposition (APP) sensor 1, ECM
P1640Engine control module, output driver 1 supply voltage highWiring, loose alternator connection, alternator
P1641Malfunction indicator lamp (MIL) -circuit malfunctionWiring, poor connections, MIL, ECM
P1641AlC compressor clutch relay -circuit malfunctionWiring open circuit/short circuit to ground, AlC compressor clutch relay, ECM
P1650Engine control module, output driver 2 supply voltage highWiring, loose alternator connection, alternator
P1651Engine coolant blower motor relay 1 -circuit malfunctionWiring, engine coolant blower motor relay, ECM
P1652Engine coolant blower motor relay 2 & 3 circuitmalfunctionWiring, engine coolant blower motor relay(s), ECM
P1653Fuel gauge, control signal -circuit malfunctionWiring, ECM
P1653Engine oil level ‘low’ warning lamp, control signal -circuit malfunctionWiring short circuit to ground, engine oil level, ECM
P1654AlC compressor clutch relay -circuit malfunctionWiring open circuit/short circuit to ground, AlC compressor clutch relay, ECM
P1655Evaporative emission (EVAP) canister purge valve-circuit malfunctionWiring open circuit/short circuit to ground, EVAP canister vent valve, ECM
P1656Camshaft position actuator -circuit malfunctionWiring open circuit/short circuit to ground, camshaft position actuator, ECM
P1660Engine control module, output driver 3 supplyvoltage highWiring, loose alternator connection, alternator
P1660Engine control module, serial input driver module -supply voltage highWiring short circuit to positive, ECM
P1662Cruise control, inhibit output circuit malfunctionWiring open circuit/short circuit to ground, cruise control motor/actuator, cruise control module, ECM
P1663Alternator warning lamp, control signal -circuitmalfunctionWiring, instrument panel, ECM
P1665Evaporative emission (EVAP) canister vent valve -circuit malfunctionWiring open circuit/short circuit to ground, EVAP canister vent valve, ECM
P1668Alternator ‘L’ terminal -circuit malfunctionWiring ” ECM , voltage regulator, alternator
P1670Engine control module, output driver 4 supplyvoltage highWiring, loose alternator connection, alternator
P1671Malfunction indicator lamp (MIL) -circuit malfunctionWiring open circuit/short circuit to ground/ short circuit to positive, MIL, ECM
P1672Engine oil level ‘low’ warning lamp, control signal -circuit malfunctionWiring short circuit to ground, engine oil level, ECM
P1673Engine coolant ‘hot’ warning lamp -circuit malfunctionWiring open circuit/short circuit to ground/ short circuit to positive, instrument panel, cooling system, ECM
P1675Evaporative emission (EVAP) canister vent valve -circuit malfunctionWiring, poor connection, EVAP canister vent valve, ECM
P1676Evaporative emission (EVAP) canister purge valve -circuit malfunctionWiring open circuit/short circuit to ground, EVAP canister purge valve, ECM
P1680Engine control module (ECM)ECM
P1680Accelerator pedal position (APP) sensor 2 circuit malfunctionWiring open circuit/short circuit to ground/shortcircuit to positive, APP sensor, ECM
P1681Engine control module (ECM) malfunctionECM
P1682Engine control module (ECM) -ignition power supply less than 10 VWiring, ECM
P1682Throttle control module/engine control module (ECM) -ignition power supply variationWiring, ECM
P1683Engine control module (ECM) -malfunctionECM
P1689Traction control system (TCS), delivered torque signal -malfunctionWiring, poor connections, ECM
P1810Transmission gear pressure switch, signal _.circuit malfunctionWiring open circuit/short circuit to ground, reverse/D1/D2/D3/D4 gear pressure switch(es),ECM
P3401Cylinder cut-out solenoid, cylinder 1 malfunctionWiring, cylinder cut-out solenoid, mechanical fault, ECM
P3425Cylinder cut-out solenoid, cylinder 4 malfunctionWiring, cylinder cut-out solenoid, mechanical fault, ECM
P3441Cylinder cut-out solenoid, cylinder 6 malfunctionWiring, cylinder cut-out solenoid, mechanical fault, ECM
P3449Cylinder cut-out solenoid, cylinder 7 malfunctionWiring, cylinder cut-out solenoid, mechanical fault, ECM
U1000CAN data bus -communication malfunctionWiring, BCM, ECM, antilock brake system (ABS)/traction control system (TCS), instrumentation control module, SDM
U1040Antilock brake system (ABS)/traction control system (TCS), CAN data bus -communication malfunctionWiring, ABS/TCS trouble codes stored
U1064. Body control module (BCM), CAN data bus -communication malfunctionWiring, BCM