GM OBD/OBD2 Codes >> GM 96-00 5.7L VIN R Tahoe

GM

96-00 5.7L VIN R
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
P1120Throttle motor position sensor 1 -circuit malfunctionWiring, 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, 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
P1153Heated oxygen sensor (H02S) 1, bank 2 -insufficient switchingWiring, oxygen sensor heater, exhaust system leaking, H02S
P1154Heated oxygen sensor (H02S) 1, bank 2 -slow responseWiring, oxygen sensor heater, exhaust system leaking, H02S
P1158Heated oxygen sensor (H02S) 2, bank 2 -not switching, fuel trim (FT) rich mixtureWiring, exhaust system leaking, H02S
P1171Fuel system -lean during accelerationFuel filter, fuel pump, H02S, injectors
P1172Fuel level sensors, primary and secondary -no fuel level change during fuel transfer from secondary to primary tankWiring, fuel pump relays, secondary fuel pump, fuel level sensors, ECM
P1187Engine oil temperature (EOT) sensor -voltage lowWiring open circuit/short circuit to ground, EOT sensor, ECM
P1188Engine oil temperature (EOT) sensor -voltage highWiring open circuit/short circuit to positive, EOT sensor, ECM
P1220Throttle motor position sensor 2 -circuit malfunctionWiring, throttle control module
P1221Throttle motor position sensor 1/2 -signal variationWiring, throttle control module
P1222Injector control, circuit monitor -malfunctionInjector, Wiring
P1250Intake manifold heater -circuit malfunctionWiring, intake manifold heater, intake manifold heater relay
P1258Engine overheatingCooling system, ECT sensor
P1271Accelerator pedal position (APP) sensor 1/2 -signal variationWiring, APP sensor, ECM
P1272Accelerator pedal position (APP) sensor 2/3 -signal variationWiring, APP sensor, ECM
P1273Accelerator pedal position (APP) sensor 1/3 -signal variationWiring, APP sensor, ECM
P1275Accelerator pedal position (APP) sensor 1 -circuit malfunctionWiring, APP sensor, ECM
P1276Accelerator pedal position (APP) sensor 1 -range performanceWiring, 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 -circuit malfunctionWiring, APP sensor, ECM
P1286Accelerator pedal position (APP) sensor 3 -range performanceWiring, APP sensor, ECM
P1336Crankshaft position sensor (CKP) -variation not learnedLearning procedure not performed
P1345Crankshaft position sensor (CKP)/camshaft position sensor (CMP) -signal variationCKP sensor, distributor/camshaft alignment, mechanical fault
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 (Ie) circuit -voltage lowWiring, circuit short circuit to ground, poor connections, ICM, ECM
P1362Ignition control, bypass circuit -voltage lowWiring short circuit to ground, ICM, ECM
P1371Ignition control reference signal, low/high resolution -low signal lostWiring,ICM
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
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
P1408Manifold absolute pressure (MAP) sensor -voltage out rangeWiring, poor connections, MAP sensor, ECM
P1410Evaporative emission (EVAP) canister purge valve -circuit malfunctionWiring, poor connectios, EVAP canister vent valve, ECM
P1415Secondary air injection (AIR) system, bank 1Wiring, hoses blocked/leaking, AIR valve
P1416Secondary air injection (AIR) system, bank 2Wiring, hoses blocked/leaking, AIR valve
P1431Fuel level sensor -circuit malfunctionWiring, fuel level sensor
P1432Fuel level sensor -low voltageWiring open circuit, fuel level sensor
P1433Fuel level sensor -voltage highWiring short circuit to positive, fuel level sensor
P1441Evaporative emission (EVAP) system -leak detectedHose connection(s), EVAP canister, EVAP canister purge valve
P1442Evaporative emission (EVAP) system vacuum switch -circuit malfunctionHoses blocked/leaking, wiring, EVAP canister, ECM
P1450Barometric pressure (BARO) sensor -voltage out of rangeWiring, BARO sensor, ECM
P1451Barometric pressure (BARO) sensor -performance rangeWiring, poor connections, BARO sensor, ECM
P1500Ignition switch, cranking signal/ system voltage -circuit malfunctionWiring, poor connections, ECM
P1504Engine control module (ECM), vehicle speed sensor (VSS) output signal -circuit malfunctionWiring, poor connections, ABS, ECM
P1508Idle air control (lAC) valve -low rpmWiring open circuit/short circuit to ground/ short circuit to positive, lAC valve, throttle valve tight/sticking
P1509Idle air control (lAC) valve -high rpmWiring open circuit/short circuit to ground/ short circuit to positive, lAC valve, throttle valve tight/sticking
P1510Engine control module (ECM), KAM supply voltage -circuit malfunctionWiring, poor connections, ECM
P1514Throttle control unit, intake air flow -excessiveThrottle control unit, MAP sensor, CMP sensor signal, ECM
P1515Throttle command/actual throttle position -signal variationWiring, 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
P1519Throttle motor position sensor 1 -signal malfunctionThrottle control module
P1520Park/neutral position (PNP) switch -circuit malfunctionWiring short circuit to ground, PNP switch incorrectly adjusted
P1523Throttle control unit, closed throttle position -performanceThrottle valve movement restricted, throttls control unit
P1530Ignition timing adjustment connectorWiring short circuit to ground, connector short to ground
P1532A/C refrigerant temperature sensor -voltage lowWiring open circuit/short circuit to ground, A/C refrigerant temperature sensor, ECM
P1533A/C refrigerant temperature sensor -voltage highWiring open circuit/short circuit to ground, A/C refrigerant temperature sensor, ECM
P1539A/C compressor clutch relay -voltage highWiring, A/C compressor clutch relay, ECM
P1543A/C system -performanceRefrigerant low, wiring, A/C refrigerant pressure sensor, A/C evaporator temperature sensor, ECM
P1545A/C compressor clutch relay -voltage lowWiring, A/C compressor clutch relay, ECM
P1546A/C compressor clutch relay -circuit malfunctionWiring, A/C 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
P1572Traction control system (TCS), active signal -malfunctionWiring short to ground, ABS/TCS, ECM
P1574Brake pedal position switch (BPP), voltage highWiring, ABS
P1575Brake pedal position switch (BPP), extended travel contacts -voltage highWiring, ABS
P1586Cruise control system, brake switch 2 -circuit malfunctionWiring, poor connections, BPP switch
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
P1621Engine control module (ECM) -malfunctionECM
P1624Engine control module (ECM) -memory performanceECM
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
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, fuel tank level sensor, ECM
P1641Engine coolant blower motor relay 1 -circuit malfunctionWiring, engine coolant blower motor relay, ECM
P1642Engine coolant blower motor relay 2 & 3 -circuit malfunctionWiring, engine coolant blower motor relay(s), ECM
P1643Engine speed (RPM), engine control module (ECM) output signal -circuit malfunctionWiring, tachometer, ECM
P1644Traction control system (TCS), delivered torque signal -malfunctionWiring, poor connections, ECM
P1651Engine coolant blower motor relay 1 -circuit malfunctionWiring, engine coolant blower motor relay, ECM
P1652 (1996)Engine control module(ECM), vehicle speed sensor (VSS) output signal -circuit malfunctionWiring, poor connections, ECM
P1652 (1997-2000)Engine control module (ECM), firm suspension request signal -circuit malfunctionWiring, .poor connections, suspension control module, ECM
P1653Fuel gauge, control signal -circuit malfunctionWiring, ECM
P1654NC 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
P1657Skip shift solenoid -circuit malfunctionWiring, skip shift solenoid, ECM
P1661Malfunction indicator lamp (MIL) -circuit malfunctionWiring, MIL, ECM
P1662Cruise control, inhibit output circuit -malfunctionWiring open circuit/short circuit to ground, cru.ise control motor/actuator, cruise control module, ECM
P1663Alternator warning lamp, control signal -circuit malfunctionWiring, instrument panel, ECM
P1664Skip shift warning lamp-circuit malfunctionWiring, skip shift warning lamp, ECM
P1665Evaporative emission (EVAP) canister vent valve -circuit malfunctionWiring open circuit/short circuit to ground, EVAP canister vent valve, ECM
P1667Reverse inhibit solenoid -circuit malfunctionWiring, reverse inhibit solenoid, 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
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
P1740Cruise control system, overdrive disable signal -voltage lowWiring short to ground, ECM
P1781Transmission control module (TCM), malfunction indicator lamp (MIL) request signal -voltage high/lowWiring TCM, ECM
P1810Transmission gear pressure switch, signal -circuit malfunctionWiring open circuit/short circuit to ground, reverse/D1/D2/D3/D4 gear pressure switch(es), ECM
P1860Torque converter clutch (TCC) solenoid, pulse width modulation (PWM) -circuit malfunctionWiring open circuit/short circuit to ground, TCC solenoid, ECM
P1870Torque converter clutch (TCC) -slip speed excessiveTransmission fluid level, wiring, TCC solenoid, ECM
P1875Transmission, 4WD low selection signal circuit malfunctionWiring, transmission, four wheel drive control module, ECM
U1000CAN data bus -communication malfunctionWiring, BCM, ECM, instrumentation control module, SOM
U1026Transmission control module (TCM)/four wheel drive control module, CAN data bus communication malfunctionWiring, BCM
U1041Antilock brake system (ABS)/traction control system (TCS), CAN data bus communication malfunctionWiring, ABS/TCS trouble codes stored
U1064Body control module (BCM), CAN data bus communication malfunctionWiring, BCM
U1192Engine control module (ECM)/immobilizer control module, CAN data bus -signal malfunctionWiring, immobilizer control module, ECM
U1193Engine control module (ECM)/immobilizer control module, CAN data bus -signal malfunctionWiring, immobilizer control module, ECM
U1300CAN data bus -signal lowWiring
U1301CAN data bus -signal highWiring
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Jeff Knight
Jeff Knight
5 years ago

Could you please tell or explain to me what the heck is the ECM/IMMOBILIZER control module is?