GM OBD/OBD2 Codes >> GM Grand AM

GM

Various Models
Scan CodeFault LocationProbable Cause
POOOO-P0999Refer to OBD-II trouble code table
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 (ECT) 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 -slow responseWiring, 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
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 blocked/leaking/interchanged/not connected, wiring short circuit to ground, supercharger (SC) bypass valve solenoid, ECM
P1336Crankshaft position sensor (CKP) -variation not learnedLearning procedure not performed
P1350Ignition control system, bypass circuit -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, ignition control (IC) circuit -voltage lowWiring, circuit short circuit to ground, poor connections, ICM, ECM
P1362Ignition control, bypass circuit -voltage lowWiring short circuit to ground, ICM, ECM
P1374Crankshaft position sensor (CKP), 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, ABS
P1403Exhaust gas recirculation (EGR) solenoid 1 – circuit malfunctionWiring, EGR valve, ECM
P1404Exhaust gas recirculation (EGR) valve -not fully closingWiring, poor connections, EGR valve position sensor, EGR solenoid
P1405Exhaust gas recirculation (EGR) solenoid 3 – circuit malfunctionWiring, EGR valve, ECM
P1406Exhaust gas recirculation (EGR) valve position sensor -range performanceWiring, EGR valve tight/sticking, EGR valve position sensor
P1441Evaporative emission (EVAP) system -leak detectedHose connection(s), EVAP canister, EVAP canister purge valve
P1483Engine cooling system – performanceCooling system, engine coolant temperature (ECT) sensor, intake air temperature (IAT) sensor
P1520Park/neutral position (PNP) switch -circuit malfunctionWiring short circuit to ground, PNP switch incorrectly adjusted
P1530A/C refrigerant pressure sensor/switch – circuit malfunctionWiring, A/C refrigerant pressure sensor/switch, ECM
P1531A/C refrigerant pressure sensor -voltage lowIncorrect refrigerant charge, wiring, A/C refrigerant pressure sensor, ECM
P1546A/C compressor clutch relay -circuit malfunctionWiring, A/C compressor clutch relay, ECM
P1550Cruise control system, motor actuator – circuit malfunctionWiring, 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 – circuit malfunctionWiring, poolr 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, ABS/TCS
P1573Engine control module (ECM), ABS/TCS communication -malfunctionWiring, poor connections, ABS control module, ECM
P1575Brake pedal position switch (BPP), 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)I antilock brake system (ABS)/traction control system (TCS)/instrumentation control modulel 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
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
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 not completed
P1631Engine control module (ECM) -incorrect immobilizer codeIncorrect key, immobilizer code not programmed
P1632Engine control module (ECM) -fuel disable signal receivedFuses, SCM, immobilizer code
P1635Engine control module (ECM), sensor supply voltage -circuit malfunctionWiring, poor connections, TP sensor, MAP sensor, EGR valve position sensor, FTP sensor, ECM
P1639Engine control module (ECM), sensor supply voltage -circuit malfunctionWiring, poor connections, fuel tank level sensor, ECM
P1640Engine control module (ECM), quad driver/output driver – circuit malfunctionWiring, ECM controlled components, ECM
P1641 (1996-1997)Malfunction indicator lamp (MIL) – circuit malfunctionWiring, poor connections, MIL, ECM
P1641 (1998-2002)A/C compressor clutch relay – circuit malfunctionWiring open circuit/short circuit to ground, A/C compressor clutch relay, ECM
P1643Fuel pump, control signal -circuit malfunctionWiring, fuel pump control module, ECM
P1644Traction control system (TCS), delivered torque signal -malfunctionWiring, poor connections, ECM
P1645 (1996-1997)Supercharger bypass valve, control signal – circuit malfunctionWiring, SC bypass valve, ECM
P1646 (1998-2002)Supercharger (SC) bypass valve, control signal – circuit malfunctionWiring, SC bypass valve, ECM
P1650Engine control module (ECM), quad drive/output driver -circuit malfunctionWiring, ECM controlled components, ECM
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
P1654AC compressor clutch relay -circuit malfunctionWiring open circuit/short circuit to ground, A/C compressor clutch relay, ECM
P1655Evaporative emission (EVAP) canister purge valve -circuit malfunctionWiring open circuit/short circuit to ground, EVAP canister vent valve, ECM
P1660Engine control module (ECM), quad driver/output driver – circuit malfunctionWiring, ECM controlled components, 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 -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, reverse inhibit solenoid, ECM
P1670Engine control module (ECM), quad driver/output driver-circuit malfunctionWiring, ECM controlled components, ECM
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, 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
P1810Transmission fluid pressure (TFP) switch manual valve positionFluid level low, wiring, selector lever linkage incorrectly adjusted, ECM
P1811Shift time too long – adaption limit reachedFluid level low, transmission mechanical fault
P1814Torque converter clutch (TCC) – over-stressedFluid level low, fluid condition, transmission mechanical fault
P1819Transmission range (TR) switch, signals ‘A/B/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 short to ground, TR switch
P1823Transmission range (TR) switch, signal ‘P’ – voltage lowWiring short to ground, TR switch
P1825Transmission range (TR) switch, signals ‘A/B/C & P’ – incorrect signalWiring, TR switch
P1826Transmission range (TR) switch, signals ‘C’ – voltage highWiring, TR switch
P1860Torque converter clutch (TCC) solenoid – circuit malfunctionWiring open circuit/short circuit to ground, TCC solenoid, ECM
P1887Torque converter clutch (TCC) release switch – circuit malfunctionWiring open circuit, TCC solenoid release switch, ECM
U1000CAN data bus -communication malfunctionWiring, BCM, ECM, instrumentation control module, SOM
U1016CAN data bus, engine control module (ECM)/antilock brake system (ABS)/traction control system (TCS)/instrumentation control module/diagnostic control module – loss of serial communicationWiring, poor connections, ECM, ABS/TCS, diagnostic control module, instrumentation control module
U1254CAN data bus – loss of serial communicationWiring, BCM, ECM, instrumentation control module, SDM
U1255CAN data bus – communication malfunctionWiring, BCM, ECM, instrumentation control module, SDM
U1300CAN data bus – signal lowWiring
U1301CAN data bus -signal highWiring
U1305CAN data bus -signal high or lowWiring
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