Pontiac OBD/OBD2 Codes >> Aztek – Bonneville – Grand AM – Grand Prix – Trans Sport – Vibe

ModelYearEngine identificationSystem
Aztek 3.4L2001-05VIN  position 8 =  EGM
Bonneville 3.8/4.6L1994-05VIN  position 8 =  L/K/Y/1GM
Grand AM  2.2L2002-05VIN  position 8 =  FGM
Grand AM  2.4L1996-01VIN  position 8 =  TGM
Grand AM  3.1 L1996-98VIN  position 8 =  MGM
Grand AM  3.4L1999-05VIN  position 8 =  EGM
Grand Prix 3.4L1994-95VIN  position 8 =  XGM
Trans Sport 3.8L1994-95VIN  position 8 =  LGM
Vibe  1.8/2.4L2003-09VIN  position 8 =  0/8/LGM

General information

  • 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) 1 or 2

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
P1010Rocker arm oil control actuator -circuit malfunctionWiring open circuit/short circuit to ground, rocker arm oil control actuator, ECM
P1011Rocker arm oil control actuator -circuit malfunctionWiring open circuit/short circuit to positive, rocker arm oil control actuator, rocker arm oil pressure switch, ECM
P1012Rocker arm oil pressure switch -circuit malfunctionWiring open circuit/short circuit to ground, mechanical fault, rocker arm oil control actuator,rocker arm oil pressure switch, ECM
P1101Intake air flow -incorrectWiring, mechanical fault, engine coolant temperature (ECT) 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 (ECT) sensor voltage low, intermittentWiring short circuit to ground, poor connections
P1115Engine coolant temperature (EeT) sensor voltage high, intermittentWiring open circuit/short to positive, poor connections
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
P1133Oxygen sensor (02S)/heated oxygen sensor (H02S) 1, bank 1 -insufficient switchingWiring, exhaust system leaking, 02S/H02S
P1134Heated oxygen sensor (H02S) 1, bank 1 slowresponseWiring, oxygen sensor heater, exhaust system leaking, H02S
P1137Heated oxygen sensor (H02S) 2, bank 1 voltage lowWiring, exhaust system leaking, H02S
P1138Heated oxygen sensor (H02S) 2, bank 1 voltage highWiring, H02S
P1153Heated oxygen sensor (H02S) 1, bank 2insufficient switchingWiring, oxygen sensor heater, exhaust system leaking, H02S
P1154Heated oxygen sensor (H02S) 1, bank 2 slow responseWiring, oxygen sensor heater, exhaust system leaking, H02S
P1171Fuel system -lean during accelerationFuel filter, fuel pump, H02S, injectors
P1189Engine oil pressure warning lamp switch -circuit malfunctionWiring, engine oil pressure warning lamp switch
P1200Injectors -circuit malfunctionWiring open circuit/short circuit to ground/short circuit to positive, injectors, ECM
P1257Supercharger (SC), boost -too highSupercharger (SC) bypass valve hoses blockedlleaking/interchanged/not connected, wiring short circuit to ground, supercharger (SC) bypass valve solenoid, ECM
P1300Ignition control, cylinder 1 -circuit malfunctionWiring, ignition coil, ECM
P1305Ignition control , cylinder 2 -circuit malfunctionWiring, ignition coil, ECM
P1310Ignition control, cylinder 3 -circuit malfunctionWiring, ignition coil, ECM
P1315Ignition control , cylinder 4 -circuit malfunctionWiring, ignition coil, ECM
P1335Crankshaft position (CKP) sensor -circuit malfunctionWiring, CKP sensor, ECM
P1336Crankshaft position (CKP) sensor -variation not learnedLearning procedure not performed
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 monitor circuit -malfunctionWiring, poor connections, ICM, ECM
P1351Ignition control system, coil -voltage highWiring open circuit, ICM, ECM
P1352Ignition control system, bypass circuit voltage highWiring open circuit, ICM, ECM
P1361Ignition control system, IC circuit -voltage lowWiring, circuit short circuit to ground, poorconnections, ICM, ECM
P1362Ignition control, bypass circuit -voltage lowWiring short circuit to ground, ICM, ECM
P1372Crankshaft position (CKP) sensorWiring open circuit/short circuit to ground/ short circuit to positive, CKP sensor, 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 ECM -malfunctionABSITCS trouble code(s) stored
P1381Antilock brake system (ABS)/traction controlsystem (TCS), rough road signal to ECM -nocommunicationWiring, poor connections, ABSITCS
P1403Exhaust gas recirculation (EGR) solenoid 1circuit malfunctionWiring, EGR valve, ECM
P1404Exhaust gas recirculation (EGR) valve not fully closingWiring, poor connections, EGR valve position sensor, EGR solenoid
P1404Exhaust gas recirculation (EGR) solenoid 2 circuit malfunctionWiring, EGR valve, ECM
P1405Exhaust gas recirculation (EGR) solenoid 3circuit malfunctionWiring, EGR valve, ECM
P1406Exhaust gas recirculation (EGR) valve positionsensor 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 vacuum switch -circuit malfunctionHoses blockedlleaking, wiring, EVAP canister, ECM
P1483Engine cooling system -performanceCooling system, engine coolant temperature(ECT) sensor, intake air temperature (IAT) sensor
P1520Park/neutral position (PNP) switch -circuitmalfunctionWiring short circuit to ground, PNP switchincorrectly adjusted
P1530NC refrigerant pressure sensor/switch -circuit malfunctionWiring, NC refrigerant pressure sensor/switch, ECM
P1531NC refrigerant pressure sensor -voltage lowIncorrect refrigerant charge, wiring, AlC refrigerant pressure sensor, ECM
P1536NC system -ECT over temperatureCooling system
P1540NC system -high pressureWiring open circuit, NC refrigerant high pressure switch, AlC system
P1546AlC compressor clutch relay -circuit malfunctionWiring, AlC compressor clutch relay, ECM
P1550Cruise control system, motor actuator -circuitmalfunctionWiring, poor connections, cruise control motor/actuator, ECM
P1554Cruise control status circuit -high voltageWiring open circuit/short circuit to ground, cruise control module, ECM
P1558Cruise control system -performance lowWiring, poor connections, accelerator cable sticking
P1561Cruise control, vent solenoid -circuit malfunctionWiring, solenoid valve
P1562Cruise control, vacuum solenoid -circuit malfunctionWiring, solenoid valve
P1565Cruise control servo position sensor -circuitmalfunctionWiring, poor connections, servo position sensor
P1567Cruise control master switch -circuit malfunctionWiring, poor connections, cruise control master switch
P1568Cruise control system -performance highWiring, poor connections, accelerator cable sticking
P1571Traction control system (TCS), torque request signal -malfunctionWiring, poor connections, ABSITCS
P1573Engine control module (ECM), ABSITCS communication -malfunctionWiring, poor connections, ABS control module, ECM
P1575Brake pedal position (BPP) switch, extended travel contacts -voltage highWiring, ABS
P1585Cruise control system. inhibit output circuitWiring, poor connections, cruise control motor/actuator, ECM
P1599Cruise control system -engine management has operated in limited power modeAccelerator cable sticking, brake vacuum release valve, cruise control actuator
P1600Engine control module (ECM) -malfunctionECM
P1601CAN data bus, engine control module(ECM)Jantilock brake system (ABS)/traction control system (TCS)Jinstrumentation control module/diagnostic control module some communication lostWiring, poor connections, ECM, ABSITCS, diagnostic control module, instrumentation control module
P1602CAN data bus. engine control module (ECM) toanti lock brake system (ABS)/traction control system (TCS) -signal malfunctionWiring, ABS control module
P1607Cruise control input processor -malfunctionWiring, ECM
P1610CAN data bus. engine control module (ECM) to body control module (BCM) -communication failureWiring, poor connections
P1619Engine oil life monitor reset switch -circuit malfunctionWiring short circuit to ground, engine oil life monitor reset switch, ECM
P1621Engine control module (ECM) -memory performanceECM
P1623Engine control module (ECM). PROM -malfunctionPoor connections, incorrect programming, ECM
P1624Customer snapshot function operatedECM trouble codes stored
P1626Engine control module (ECM) -fuel enable signal lostWiring, poor connections, immobilizer control module, ECM
P1627Engine control module (ECM) -malfunctionEngine control module (ECM)
P1629Engine control module (ECM) -fuel enable signal not receivedIncorrect ignition key, wiring, poor connections, immobilizer control module, ECM
P1630System voltage highllowWiring, battery, alternator
P1630Engine control module (ECM). immobilizer code -leaming modeECM immobilizer code programming not completed
P1631Engine control module (ECM) -incorrect immobilizer 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 voltage -voltage lowWiring open circuit, ECM
P1635Engine control module (ECM), sensor supply voltage -circuit malfunctionWiring, poor connections, TP sensor, MAP sensor, EGR valve position sensor, fuel tank pressure (FTP) sensor, ECM
P1639Engine control module (ECM), sensor supply voltage -circuit malfunctionWiring, poor connections, AlC refrigerant pressure sensor, ECM
P1640Engine control module (ECM), quad driver/output driver -circuit malfunctionWiring, ECM controlled components, ECM 0
P1641AlC compressor clutch relay -circuit malfunctionWiring open circuit/short circuit to ground, AlC compressor clutch relay, ECM
P1641Malfunction indicator lamp (MIL) -circuit malfunctionWiring, poor connections, MIL, ECM
P1643Fuel pump, control signal -circuit malfunctionWiring, fuel pump control module, ECM
P1644Traction control system (TCS), delivered torque signal -malfunctionWiring, poor connections, ECM
P1645Supercharger (SC) bypass valve, control signal -circuit malfunctionWiring, SC bypass valve, ECM
P1646Supercharger (SC) bypass valve, control signal -circuit malfunctionWiring, SC bypass valve, ECM
P1650Engine control module (ECM), quad driver/ output driver -circuit malfunctionWiring, ECM controlled components, ECM 0
P1651Engine coolant blower motor relay 1 -circuit malfunctionWiring, engine coolant blower motor relay, ECM
P1652Engine coolant blower motor relay 2 & 3 circuit malfunctionWiring, engine coolant blower motor relay(s),ECM
P1653Traction control system (TCS), delivered torque signal -malfunctionWiring, poor connections, 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 actuqtor -circuit malfunctionWiring open circuit/short circuit to ground, camshaft position actuator, ECM
P1660Engine control module (ECM), quad driver/ output driver -circuit malfunctionWiring, ECM controlled components, ECM 0
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 -circuit malfunctionWiring, instrument panel, ECM
P1665Evaporative emission (EVAP) canister vent valve -circuit malfunctionWiring open circuit/short circuit to ground, EVAP canister vent valve, ECM
P1667Fuel pump, control signal -circuit malfunctionWiring, fuel pump control module, ECM
P1668Alternator ‘L’ terminal -circuit malfunctionWiring, voltage regulator, alternator, ECM
P1670Engine control module (ECM), quad driver/output driver -circuit malfunctionWiring, ECM controlled components, ECM D
P1671Malfunction indicator lamp (MIL) -circuitmalfunctionWiring 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, control signal -circuit malfunctionWiring, 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) -malfunctionECM
P1681Engine control module (ECM) -malfunctionECM
P1683Engine control module (ECM) -malfunctionECM
P1689Traction control system (TCS), delivered torque signal -malfunctionWiring, poor connections, ECM
P1690Rocker arm oil control actuator -circuit malfunctionWiring open circuit/short circuit to ground, rocker arm oil control actuator, ECM
P1692Rocker arm oil control actuator -circuit malfunctionWiring open circuit/short circuit to positive, rocker arm oil control actuator, rocker arm oil pressure switch, ECM
P1693Rocker arm oil pressure switch -circuit malfunctionWiring open circuit/short circuit to ground, mechanical fault, rocker arm oil control actuator, rocker arm oil pressure switch, ECM
P1725Transmission input shaft speed sensor circuit malfunctionWiring open circuit/short circuit to ground, input shaft speed sensor, ECM
P1760Transmission fluid pressure (TFP) solenoid -circuit malfunctionWiring open circuit/short circuit, TFP solenoid, ECM
P1780Park/neutral position (PNP) switch -circuit malfunctionWiring short circuit to ground, PNP syvitch incorrectly adjusted, PNP switch, ECM
P1790Overdrive solenoidWiring open circuit/short circuit, overdrive solenoid, ECM
P1810Transmission fluid pressure (TFP) switch -manual valve pOSitionFluid level low, wiring, selector lever linkage incorrectly adjusted, ECM
P1811Shift time too long -adaptation limit reachedFluid level low, transmission mechanical fault
P1814Torque converter clutch (TCC) -over-stressedFluid level low, fluid condition, transmission mechanical fault
P1815Transmission fluid pressure (TFP) switch -invalidgear selectionWiring, selector lever linkage incorrectly adjusted, TFP switch, ECM
P1816Transmission fluid pressure (TFP) switch -invalid gear selectionWiring, selector lever linkage incorrectly adjusted, TFP switch, ECM
P1817Transmission fluid pressure (TFP) switch -invalidgear selectionWiring, selector lever linkage incorrectly adjusted, TFP switch, ECM
P1818Transmission fluid pressure (TFP) switch -invalid gear selectionWiring, selector lever linkage incorrectly adjusted, TFP switch, ECM
P1819Transmission range (TR) switch, signals ‘AlB/C &P’ signal variationWiring, TR switch
P1820Transmission range (TR) switch, signal ‘A’voltage lowWiring short to ground, TR switch
P1822Transmission range (TR) switch, signal ‘B’voltage highWiring, TR switch
P1823Transmission range (TR) switch, signal ‘P’voltage lowWiring short to ground, TR switch
P1825Transmission range (TR) switch, signals ‘AlB/C &P’ -incorrect signalWiring, TR switch
P1826Transmission range (TR) switch, signal ‘C’ voltage highWiring, TR switch
P1842Gear shift, 1-2 -malfunctionATF level/condition, short circuit, wiring, 55, TCM
P1843Gear shift, 1-2 -malfunctionATF level/condition, short circuit, wiring, 55, TCM
P1845Gear shift, 2-3 -malfunctionATF level/condition, short circuit, wiring, 55, TCM
P1847Gear shift, 2-3 -malfunctionATF level/condition, short circuit, wiring, 55, TCM
P1860Torque converter clutch (TCC) solenoid -circuit malfunctionWiring open circuit/short circuit to ground, TCC solenoid, ECM
P1866Torque converter clutch (TCC) solenoid -circuit malfunctionWiring open circuit/short circuit to positive, TCC solenoid, TCM, ECM
P1867Torque converter clutch (TCC) solenoid -circuit malfunctionWiring open circuit/short circuit to positive,TCCso~n~d,TCM,ECM
P1868Transmission fluid lifeReplace transmission fluid and filter
P1887Torque converter clutch (TCC) release switch -circuit malfunctionWiring open circuit, TCC solenoid release switch, ECM
U1000CAN data bus -communication malfunctionWiring, BCM, ECM, instrumentation controlmodule,50M
U1001CAN data bus -loss of serial communicationWiring, BCM, ECM, instrumentation controlmodule,50M
U1016CAN data bus, engine control module (ECM)/antilock brake system (ABS)/traction control system (TCS)linstrumentation control module/diagnostic control module -loss of serial communicationWiring, poor connections, ECM, AB5ITC5,diagnostic control module, instrumentation control module
U1161CAN data bus -communication malfunction, door control moduleWiring, passenger door control module
U1162CAN data bus -communication malfunction, door control moduleWiring, rear door control module
U1163CAN data bus -communication malfunction, door control moduleWiring, rear door control module
U1170CAN data bus -communication malfunction, door control moduleWiring, driver door control module, driver’s door switch module
U1254CAN data bus -loss of serial communicationWiring, SCM, ECM, instrumentation control module,SDM
U1255CAN data bus -communication malfunctionWiring, SCM, ECM, instrumentation control module,SDM
U1300CAN data bus -signal lowWiring
U1301CAN data bus -signal highWiring
U1305CAN data bus -signal high or lowWiring
U1450CAN data bus -communication malfunction, electronic compassWiring, electronic compass, instrumentation control module
U1500Vehicle communication interface module (VCIM) -malfunctionVCIM
U2105Engine control module (ECM), CAN data bus -lost communication with body control module (BCM)/transmission control module (TCM)Wiring