GM OBD/OBD2 Codes >> GM 96-02 4.0L VIN C

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96-02 4.0L VIN C
Scan Code Fault Location Probable Cause
P0000-P0999 Refer to OBD-II generic trouble code table –
P1106 Manifold absolute pressure (MAP) sensor -circuit intermittent -voltage high Wiring open circuit/short circuit to ground/ short circuit to positive
P1107 Manifold absolute pressure (MAP) sensor -circuit intermittent -voltage low Wiring short circuit to ground
P1108 Barometric pressure (BARO) sensor/manifold absolute pressure (MAP) sensor -comparison too high Wiring open circuit/short circuit to positive, MAP sensor, ECM
P1111 Intake air temperature (IAT) sensor -circuit intermittent -voltage high Wiring open circuit, ground lead defective
P1112 Intake air temperature (IAT) sensor -circuit intermittent -voltage low Wiring short circuit to ground
P1114 Engine coolant temperature (ECT) sensor -circuit malfunction -voltage low Wiring short circuit to ground
P1115 Engine coolant temperature (ECT) sensor -circuit malfunction -voltage high Wiring open circuit, ground lead defective
P1121 Throttle position (TP) sensor -circuit malfunction -voltage high Wiring short circuit to positive, ground lead defective
P1122 Throttle position (TP) sensor -circuit malfunction -voltage low Wiring open circuit/short circuit to ground
P1133 Heated oxygen sensor (H02S) 1, bank 1 -insufficient switching Wiring, oxygen sensor heater, exhaust system leaking, H02S
P1134 Heated oxygen sensor (H02S) 1, bank 1 -slow response Wiring, oxygen sensor heater, exhaust system leaking, H02S
P1139 Heated oxygen sensor (H02S) 2, bank 1 -insufficient switching Wiring, oxygen sensor heater, exhaust system leaking, H02S
P1140 Heated oxygen sensor (H02S) 2, bank 1 -slow response Wiring, oxygen sensor heater, exhaust system leaking, H02S
P1153 Heated oxygen sensor (H02S) 1, bank 2 -insufficient sWitching Wiring, oxygen sensor heater, exhaust system leaking, H02S
P1154 Heated oxygen sensor (H02S) 1, bank 2 -slow response Wiring, oxygen sensor heater, exhaust system leaking, H02S
P1258 Engine overheating Cooling system, engine coolant temperature (ECT) sensor
P1320 Ignition control module (ICM) -4X reference circuit, intermittent Wiring open circuit/short circuit to ground, ICM, ECM
P1323 Ignition control module (ICM) -24X reference circuit, low frequency Wiring open circuit/short circuit to ground, ICM, ECM
P1336 Crankshaft position sensor (CKP) -variation not learned Learning procedure not performed
P1350 Ignition control module (lCM) -bypass line monitor circuit malfunction Wiring open circuit/short circuit to ground/ short circuit to positive, ICM, ECM
P1359 Ignition control module (ICM) bank 1 -circuit malfunction Wiring open circuit/short circuit to positive. lCM, ECM
P1360 Ignition control module (ICM) bank 2 -circuit malfunction Wiring open circuit/short circuit to positive. ICM, ECM
P1370 Ignition control module (ICM) -4X reference circuit, too many pulses Wiring, electromagnetic interference, ICM
P1371 Ignition control module (ICM) -4X reference circuit, too few pulses Wiring, electromagnetic interference, ICM
P1372 Crankshaft position sensor (CKP) Wiring open circuit/short circuit to ground. short circuit to positive, CKP, ECM
P1375 Ignition control module (ICM) -24X reference circuit, voltage high Wiring open circuit/short circuit to ground short circuit to positive, CKP sensor(s), ICM
P1376 Ignition control module (ICM) -ground circuit Wiring open circuit/short circuit to positive, ground lead defective, ICM
P1377 Ignition control module (ICM) -cam pulse/ 4X reference pulse Wiring open circuit/short circuit to ground electromagnetic interference, valve timing
P1380 Rough road signal -signal error ABS control module trouble code(s) stored
P1381 Rough road signal -no communication from ABS CAN data bus Wiring open circuit, ABS system
P1404 Exhaust gas recirculation (EGR) valve -stuck open Wiring open circuit/short circuit to positive, exhaust gas recirculation (EGR) valve position sensor, EGR solenoid
P1406 Exhaust gas recirculation (EGR) valve position sensor -circuit malfunction Wiring open circuit/short circuit to ground/ short circuit to positive, exhaust gas recirculation (EGR) valve position sensor, EGR valve
P1415 Secondary air injection (AIR) system Wiring, hoses blocked/leaking, AIR valve
P1416 Secondary air injection (AIR) system Wiring, hoses blocked/leaking, AIR valve, AIR pump relay
P1441 Evaporative emission (EVAP) system -leak detected Hose connection(s), EVAP cannister, EVAP canister purge valve
P1483 Engine cooling system -performance Cooling system, engine coolant temperature (ECT) sensor, intake air temperature (IAT) sensor
P1508 Idle air control (lAC) valve -rpm low Wiring open circuit/short circuit to ground, intake system blocked, throttle valve, lAC valve, ECM
P1509 Idle air control (lAC) valve -rpm high Wiring open circuit/short circuit to ground, intake system blocked, throttle valve, lAC valve, ECM
P1520 Park/neutral position (PNP) switch Wiring short circuit to ground, incorrectly adjusted
P1524 Throttle position (TP) sensor -learned closed throttle angle Accelerator cable adjustment, throttle valve tight/sticking, throttle valve incorrectly adjusted
P1526 Minimum throttle position not learned Initial learn procedure not carried out
P1533 A/C refrigerant temperature sensor -circuit malfunction low pressure side Wiring open circuit/short circuit to ground, A/C refrigerant temperature sensor, ECM
P1535 A/C refrigerant temperature sensor -circuit malfunction high pressure side Wiring open circuit/short circuit to ground, A/C refrigerant temperature sensor, ECM
P1536 A/C system -ECT over temperature Cooling system
P1537 A/C request circuit -voltage low Wiring open circuit/short circuit to ground, A/C refrigerant low pressure switch, A/C control module, ECM
P1538 A/C request circuit -voltage high Wiring open circuit/short circuit to positive, A/C control module, ECM
P1540 A/C system -high pressure Wiring open circuit, A/C refrigerant high pressure switch, A/C system, ECM
P1542 A/C system -high pressure/high temperature High ambient temperature, A/C cooling system
P1554 Cruise control status circuit -high voltage Wiring open circuit/short circuit to ground, cruise control module, ECM
P1560 Cruise control -transmission not in drive Driver error, transmission fluid pressure (TFP) switch circuit
P1564 Cruise control -acceleration too high Slippery road conditions
P1566 Cruise control -engine speed too high Slippery road conditions, transmission mechanical fault
P1567 Cruise control -active brake control system active Active brake control system engaged with cruise control on
P1570 Cruise control -traction control system (TCS) active Slippery road surface
P1571 Traction control system (TCS), torque request circuit Wiring open circuit/short circuit to ground/ short circuit to positive, ABS control module trouble code(s) stored, ECM
P1574 Brake pedal position switch (BPP) -voltage high Wiring, ABS
P1575 Brake pedal position switch (BPP) -extended travel contacts -voltage high Wiring, ABS
P1579 Transmission shifted from PIN to D/R at high throttle angle Driver error, wiring, transmission range (TR) switch
P1599 Engine stall or near stall detected ECM trouble code(s) stored, mechanical fault, transmission mechanical fault
P1602 CAN data bus -antilock brake system (ABS)I traction control system (TCS) Wiring, ABS control module trouble code(s) stored
P1603 CAN data bus -sensing/diagnostic module (SDM) Wiring
P1604 CAN data bus -instrument panel Wiring, body control module (BCM) trouble code(s) stored
P1605 CAN data bus -A/C Wiring, A/C system trouble code(s) stored
P1617 Engine oil level switch -circuit malfunction Wiring short circuit to ground, engine oil level, ECM
P1621 Engine control module (ECM) -memory performance ECM
P1624 Customer snapshot function operated ECM trouble codes stored
P1626 CAN data bus,immobilizer Wiring, body control module (BCM) trouble code(s) stored
P1633 Engine control module (ECM) ignition supply voltage, voltage low Wiring open circuit, ECM
P1634 Engine control module (ECM) -ignition supply voltage -voltage low Wiring open circuit, ECM
P1635 Sensor supply voltage -circuit A malfunction Wiring short circuit to ground/positive, ground wiring open circuit, TP sensor, MAP sensor, EGR valve position sensor, ECM
P1637 Alternator ‘L’ terminal -circuit malfunction Wiring open circuit/short circuit to ground, alternator, battery temperature sensor, ECM
P1638 Alternator ‘F’ terminal -circuit malfunction Wiring open circuit/short circuit to ground, alternator, ECM
P1639 Sensor supply voltage -circuit B malfunction Wiring short circuit to ground/positive, ground wiring open circuit, A/C refrigerant pressure sensor, fuel tank pressure (FTP) sensor, ECM
P1640 Engine control module quad driver/output driver Wiring, ECM controlled components, ECM *
P1641 Malfunction indicator lamp (MIL) -circuit malfunction Wiring open circuit/short circuit to ground, MIL, supply wire, ECM
P1642 Vehicle speed sensor (VSS) -circuit malfunction Wiring open circuit/short circuit to ground/ short circuit to positive, VSS, ECM
P1644 Delivered torque -circuit malfunction Wiring open circuit/short circuit to ground/ short circuit to positive, ABS trouble codes stored, ECM
P1645 Evaporative emission (EVAP) solenoid -circuit malfunction Wiring open circuit/short circuit to ground, EVAP solenoid, ECM
P1646 Evaporative emission (EVAP) canister purge valve -circuit malfunction Wiring open circuit/short circuit to ground, EVAP canister purge valve, ECM
P1650 Engine control module quad driver/output driver Wiring, ECM controlled components, ECM *
P1653 A/C compressor clutch relay -circuit malfunction Wiring open circuit/short circuit to ground, supply wire, A/C compressor clutch relay, ECM
P1654 Cruise control disable circuit -circuit malfunction Wiring open circuit/short circuit to ground/ short circuit to positive, cruise control module, ECM
P1660 Engine coolant blower motor relay(s) -circuit malfunction Wiring open circuit/short circuit to ground, engine coolant blower motor relay(s), ECM
* Depending on model, year and equipment level, the following components may be connected to this circuit. Use of the vehicle wiring diagram is recommended to confirm which components are fitted.  
  • o A/C compressor clutch relay
  • o A/C condenser blower motor relay
  • o Engine coolant blower motor relay
  • o Engine coolant ‘hot’ warning lamp
  • o Evaporative emission (EVAP) canister purge valve
  • o Exhaust gas recirculation (EGR) solenoid
  • o Malfunction indicator lamp (MIL)
  • o Torque converter clutch (TCC) solenoid
  • o Transmission shift solenoids (SS)
  • o Transmission shift warning lamp (MT)
 

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