| Oldsmobile Codes |
| Trouble Code |
Fault Location |
Probable Cause |
| P1031 | Heated oxygen sensor (H02S) 1, bank 1 heatercurrent monitor control circuit | Wiring short circuit to positive, H02S, ECM |
| P1032 | Heated oxygen sensor (H02S) 1, bank 1 heaterwarm up control circuit | Wiring short circuit to positive, H02S, ECM |
| 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/manifoldabsolute pressure (MAP) sensor -comparison too high | Wiring open circuit/short circuit to positive, MAP sensor, ECM |
| P1111 | Intake air temperature (IAT) sensor -circuitintermittent -voltage high | Wiring open circuit, ground lead defective |
| P1112 | Intake air temperature (lAT) 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 |
| P1120 | Throttle motor position sensor 1 -circuit malfunction | Wiring open circuit/short circuit to ground! short circuit to positive, throttle control unit, ECM |
| 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 1insufficient 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 |
| P1137 | Heated oxygen sensor (H02S) 2 -voltage low | Wiring, oxygen sensor heater, exhaust system leaking, H02S |
| P1138 | Heated oxygen sensor (H02S) 2 -voltage high | Wiring short circuit to positive, fuel pressure high, fuel contamination, injector(s) leaking, H02S, ECM |
| P1139 | Heated oxygen sensor (H02S) 2, bank 1insufficient 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 2insufficient 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 |
| P1171 | Heated oxygen sensor (H02S) 1 -voltage low | Fuel supply blocked, injector(s) blocked, manifold absolute pressure (MAP) sensor wiring |
| P1174 | Fuel Trim Cylinder Balance Bank 1 | |
| P1175 | Fuel Trim Cylinder Balance Bank 2 | |
P1200 – P1299 (Fuel and air metering – injector circuit) | | P1200 | Injector(s) -circuit malfunction | Wiring open circuit/short circuit to groundl short circuit to positive, injectors, ECM |
| P1220 | Throttle motor position sensor 2 -circuit malfunction | Wiring open circuit/short circuit to ground! short circuit to positive, throttle control unit, ECM |
| P1221 | Throttle motor position sensor 1/2 -signal variation | Wiring, throttle control unit, ECM |
| P1257 | Supercharger (SC) -over-boost | Hoses blockedlleaking/interchanged/not connected, wiring short circuit to ground, supercharger (SC) bypass valve tight/ sticking, supercharger (SC) bypass valve solenoid, ECM |
| P1258 | Engine overheating | Cooling system, engine coolant temperature (ECT) sensor |
| P1271 | Accelerator pedal position (APP) sensor 1/2signal variation | Wiring, APP sensor, ECM |
| P1275 | Accelerator pedal position (APP) sensor 1 circuit malfunction | Wiring open circuit/short circuit to ground! short circuit to positive, APP sensor, ECM |
| P1280 | Accelerator pedal pOSition (APP) sensor 2 circuit malfunction | Wiring open circuit/short circuit to ground! short circuit to positive, APP sensor, ECM |
| 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 (CKP) sensor -variation not leamed | Learning procedure not performed |
| P1345 | Crankshaft position (CKP) sensor/camshaft position (CMP) sensor -signal variation | CKP sensor, distributor/camshaft alignment, mechanical fault |
| P1350 | Ignition control module (ICM) -bypass line monitor circuit malfunction | Wiring open circuit/short circuit to groundl short circuit to positive, ICM, ECM |
| P1351 | Ignition control module (ICM) -ignition coil 1 circuit voltage high | Wiring open circuit/short circuit to ground/ short circuit to positive, ICM, ECM |
| P1352 | Ignition control module (leM) -ignition coil 2 circuit voltage high | Wiring open circuit/short circuit to ground/ short circuit to positive, ICM, ECM |
| P1353 | Ignition control module (ICM) -ignition coil 3circuit voltage high | Wiring open circuit/short circuit to ground/ short circuit to positive, ICM, ECM |
| P1354 | Ignition control module (ICM) -ignition coil 4circuit voltage high | Wiring open circuit/short circuit to groundl short circuit to positive, ICM, ECM |
| P1355 | Ignition control module (ICM) -ignition coil 5circuit voltage high | Wiring open circuit/short circuit to ground/ short circuit to positive, ICM, ECM |
| P1356 | Ignition control module (ICM) -ignition coil 6 circuit voltage high | 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, ICM, ECM |
| P1360 | Ignition control module (lCM) bank 2 -circuit malfunction | Wiring open circuit/short circuit to positive, ICM, ECM |
| P1361 | Ignition control module (ICM) -ignition coil 1circuit voltage low | Wiring short circuit to ground/positive, bypass circuit short circuit to ground, ICM, ECM |
| P1362 | Ignition control module (ICM) -ignition coil 2 circuit voltage low | Wiring short circuit to ground/positive, bypass circuit short circuit to ground, ICM, ECM |
| P1363 | Ignition control module (ICM) -ignition coil 3circuit voltage low | Wiring short circuit to ground/positive, bypass circuit short circuit to ground, ICM, ECM |
| P1364 | Ignition control module (ICM) -ignition coil 4circuit voltage low | Wiring short circuit to ground/positive, bypass circuit short circuit to ground, ICM, ECM |
| P1365 | Ignition control module (ICM) -ignition coil 5 circuit voltage low | Wiring short circuit to ground/positive, bypass circuit short circuit to ground, ICM, ECM |
| P1366 | Ignition control module (ICM) -ignition coil 6circuit voltage low | Wiring short circuit to ground/positive, bypass circuit short circuit to ground, 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 (CKP) sensor | Wiring open circuit/short circuit to ground/short circuit to positive, CKP sensor, ECM |
| P1374 | Ignition control module (ICM) -3X reference circuit malfunction | Wiring open circuit/short circuit to groundl short circuit to positive, wiring routed near spark plug wires, ignition coils arcingl tracking, ICM, ECM |
| P1375 | Ignition control module (ICM) -24X referencecircuit, 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/4Xreference 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 ASS CAN data bus . | Wiring open circuit, ABS system |
| P1403 | Exhaust gas recirculation (EGR) valve solenoid 1 | Wiring open circuit/short circuit to ground, supply wire, EGR valve, ECM |
| P1404 | Exhaust gas recirculation (EGR) valve -stuck open | Wiring open circuit/short circuit to positive, exhaust gas recirculation (EGR) valve position sensor, EGR solenoid |
| P1405 | Exhaust gas recirculation (EGR) valve solenoid 3 | Wiring open circuit/short circuit to ground, supply wire, EGR valve, ECM |
| 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 blockedlleaking, AIR valve |
| P1416 | Secondary air injection (AIR) system | Wiring, hoses blockedlleaking, AIR valve, AIR pump relay |
| P1441 | Evaporative emission (EVAP) system -leak detected | Hose connection(s), EVAP canister, EVAP canister purge valve |
| P1442 | Evaporative emission (EVAP) system vacuum switch -circuit malfunction | Hoses blockedlleaking, wiring, EVAP canister, ECM |
| P1481 | Engine cooling fan system -cooling fan speed signal missing | Wiring open circuit/short circuit to ground, supply wire, engine cooling fan clutch, ECM |
| P1482 | Engine cooling fan system -clutch circuit malfunction | Wiring open circuit/short circuit to ground, supply wire, engine cooling fan clutch, ECM |
| P1483 | Engine cooling system -performance | Cooling system, engine coolant temperature (ECT) sensor, intake air temperature (IAT) sensor |
| P1484 | Engine cooling fan system -maximum fan speed tolerance exceeded | Wiring open circuit/short circuit to ground, supply wire, engine cooling fan clutch, ECM |
| 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 |
| P1512 | Throttle control unit -signal variation | Wiring, throttle control unit, ECM |
| P1514 | Intake air flow -excessive flow | Throttle control unit, MAP sensor, CMP sensor signal, ECM |
| P1515 | Throttle command/actual throttle position -signal variation | Wiring, throttle valve sticking, throttle control unit, ECM |
| P1516 | Throttle command/actual throttle position -signal variation | Wiring, throttle valve sticking, throttle control unit, ECM |
| P1520 | Park/neutral position (PNP) switch | Wiring short circuit to ground, incorrectly adjusted |
| P1523 | Throttle control unit, throttle position during battery saving mode | Throttle valve movement restricted, throttle control unit, ECM |
| 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 |
| P1530 | AlC refrigerant pressure sensor, circuit malfunction | AlC refrigerant pressure, wiring open circuit/ short circuit to ground, AlC refrigerant pressure sensor, ECM |
| P1531 | Low AlC refrigerant charge | Low Ale refrigerant charge, wiring open circuit/short circuit to ground/short circuit to positive, AlC refrigerant low pressure switch, ECM |
| 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 |
| P1545 | Ale compressor clutch relay -circuit malfunction | Wiring open circuit/short circuit to ground, supply wire, Ale compressor clutch relay, ECM |
| P1546 | AlC compressor clutch relay -circuit malfunction | Wiring open circuit/short circuit to ground/ short circuit to positive, AlC compressor clutch relay,ECM |
| P1550 | Cruise control stepper motor, circuit malfunction | Wiring open circuit/short circuit to ground, cruise control module, ECM |
| P1554 | Cruise control status circuit -high voltage | Wiring open circuit/short circuit to ground, cruise control module, ECM |
| P1558 | Cruise control servo -servo position sensor low | Hoses leaking, cruise control servo |
| P1560 | Cruise control -transmission not in drive | Driver error, transmission fluid pressure (TFP) switch circuit |
| P1561 | Cruise control vent solenoid | Wiring open circuit/short circuit to ground! short circuit to positive, cruise control vent solenoid, cruise control servo, ECM |
| P1562 | Cruise control vacuum solenoid | Wiring open circuit/short circuit to ground! short circuit to positive, cruise control vacuum solenoid, cruise control servo, ECM |
| P1564 | Cruise control -acceleration too high | Slippery road conditions |
| P1565 | Cruise control servo position sensor -circuit malfunction | Wiring open circuit/short circuit to ground! short circuit to positive, cruise control servo, ECM |
| 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 |
| P1568 | Cruise control servo -servo position sensor high | Hoses blockedlleaking, brake pedal vacuum valve, cruise control servo |
| 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 |
| P1573 | CAN data bus -antilock brake system (ABS)! traction control system (TCS) | Wiring, ABS control module trouble code(s) stored |
| P1574 | Brake pedal position (BPP) switch -voltage high | Wiring, ABS |
| P1575 | Brake pedal position (BPP) switch -extended travel contacts -voltage high | Wiring, ABS |
| P1579 | Transmission shifted from PIN to O/R at high throttle angle | Driver error, wiring, transmission range (TR) switch |
| P1585 | Cruise control system -inhibit output circuit | Wiring open circuit/short circuit to ground/short circuit to positive, supply wire, cruise control motor/actuator, ECM |
| P1599 | Engine stall or near stall detected | ECM trouble code(s) stored, mechanical fault, transmission mechanical fault |
P1600 – P1699 (ECM – computer output circuit) | | P1600 | Engine control module (ECM) | ECM |
| P1601 | Data bus -circuit malfunction | Wiring open circuit/short circuit to ground! short circuit to positive, instrument panel, ECM |
| P1602 | CAN data bus -antilock brake system (ABS)/ traction control system (TCS) | Wiring, ABS control module trouble code(s) stored |
| P1603 | CAN data bus -sensing/diagnostic module (SOM) | Wiring |
| P1604 | CAN data bus -instrument panel | Wiring, body control module (SCM) trouble code(s) stored |
| P1605 | CAN data bus -A/C | Wiring, A/C system trouble code(s) stored |
| P1610 | CAN data bus -body control module (BCM) | Wiring, body control module (BCM) trouble code(s) stored |
| P1617 | Engine oil level switch -circuit malfunction | Wiring short circuit to ground, engine oil level, ECM |
| P1619 | Engine oil life monitor reset switch -circuit malfunction | Wiring short circuit to ground, engine oil life monitor reset switch, ECM |
| P1621 | Engine control module (ECM) -memoryperformance | ECM |
| P1623 | Engine control module (ECM) -PROM | Insecure PROM, incorrectly coded |
| P1624 | Customer snapshot function operated | ECM trouble codes stored |
| P1626 | CAN data bus, immobilizer | Wiring, body control module (SCM) trouble code(s) stored |
| P1627 | Engine control module (ECM) -memory performance | ECM |
| P1629 | Immobilizer control module -fuel enable signal | Incorrect ignition key, wiring open circuit/ short circuit to ground/short circuit to positive,immobilizer control module, ECM |
| P1630 | Engine control module (ECM), immobilizer codeleaming mode | Immobilizer code not programmed |
| P1631 | Engine control module (ECM) -incorrect immobilizer code | Incorrect key, immobilizer code not programmed |
| P1632 | Engine control module (ECM), fuel disable signal | Fuses, BCM, immobilizer code |
| 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 (ECM) quad driverl output driver | Wiring, ECM controlled components, ECM 0 |
| 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 groundl short circuit to positive, VSS, ECM |
| P1643 | Fuel pump control module -circuit malfunction | Wiring open circuit/short circuit to ground/ short circuit to positive, fuel pump control module, ECM |
| P1644 | Delivered torque -circuit malfunction | Wiring open circuit/short circuit to ground/short circuit to positive, ASS 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 (ECM) quad driver! output driver | Wiring, ECM controlled components, ECM 0 |
| P1651 | Engine coolant blower motor relay 1 -circuit malfunction | Wiring open circuit/short circuit to ground, supply wire, engine coolant blower motor relay, ECM |
| P1652 | Engine coolant blower motor relay 2 -circuit malfunction | Wiring open circuit/short circuit ·to ground, supply wire, engine coolant blower motor relay(s), 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 groundl short circuit to positive, cruise control module, ECM |
| P1655 | Evaporative emission (EVAP) canister purge valve -circuit malfunction | Wiring open circuit/short circuit to ground, EVAP canister vent valve, ECM |
| P1660 | Engine coolant blower motor relay(s) -circuit malfunction | Wiring open circuit/short circuit to ground, engine coolant blower motor relay(s), ECM |
| P1662 | Cruise control inhibit circuit -circuit malfunction | Wiring open circuit/short circuit to ground, cruise control motor/actuator, cruise control module, ECM |
| P1663 | Alternator warning lamp -circuit malfunction | Wiring open circuit/short circuit to ground! short circuit to positive, instrument panel, ECM |
| P1665 | Evaporative emission (EVAP) canister vent valve -circuit malfunction | Wiring open circuit/short circuit to ground, EVAP canister vent valve, ECM |
| P1670 | Engine control module (ECM) quad driver/ output driver | Wiring, ECM controlled components, ECM 0 |
| P1671 | Malfunction indicator lamp (MIL) -circuit malfunction | Wiring open circuit/short circuit to ground/ short circuit to positive, MIL, ECM |
| P1672 | Engine oil level warning lamp -circuit malfunction | Wiring open circuit/short circuit to ground/ short circuit to positive, instrument panel, ECM |
| P1673 | Engine coolant ‘hot’ warning lamp -circuit malfunction | Wiring open circuit/short circuit to ground! short circuit to positive, instrument panel, cooling system, ECM |
| P1674 | Tachometer -circuit malfunction | Wiring open circuit/short circuit to ground! short circuit to positive, instrument panel, ECM |
| P1675 | Evaporative emission (EVAP) canister vent valve -circuit malfunction | Wiring open circuit/short circuit to ground, EVAP canister vent valve, ECM |
| P1676 | Evaporative emission (EVAP) canister purge valve -circuit malfunction | Wiring open circuit/short circuit to ground, EVAP canister purge valve, ECM |
| P1680 | Engine control module (ECM) | ECM |
| P1681 | Engine control module (ECM) | ECM |
| P1682 | Engine control module (ECM), ignition supply voltage | Fuse, wiring open circuit, ECM |
| P1683 | Engine control module (ECM) | ECM |
| P1689 | Traction control system (TC8) -delivered torque output circuit | Wiring open circuit/short circuit to groundl short circuit to positive, ABS trouble codes stored, ECM |
| P1810 | Transmission fluid pressure (TFP) switch -manual vaive position | Fluid level low, wiring open circuit/short circuit to ground, selector lever linkage incorrectly adjusted, ECM |
| P1811 | Shift time too long -adaptation limit reached | Fluid level low, transmission mechanical fault |
| P1814 | Torque converter clutch (TCC) -over-stressed | Fluid level low, fluid condition, transmission mechanical fault |
| P1844 | Transmission Fluid Pressure Sensor/Switch 'A' Circuit Intermittent | |
| P1860 | Torque converter clutch (TCC) solenoid -circuit malfunction | Wiring open circuit/short circuit to ground, TCC solenoid, ECM |
| P1887 | Torque converter clutch (TCC) release switch -circuit malfunction | Wiring open circuit, TCC solenoid release switch, ECM |
| U1016 | Instrument panel, CAN data bus communication malfunction | Wiring open circuit!short circuit to ground/ short circuit to positive, instrument panel, ECM |
| U1026 | Transmission control module (TCM)/four wheeldrive control module, CAN data bus -communication malfunction | Wiring, SCM |
| U1041 | Antilock brake system (ABS)/traction controlsystem (TCS), CAN data bus -communicationmalfunction | Wiring, ABSfTCS trouble codes stored |
| U1064 | Body control module (SCM), CAN data bus -communication malfunction | Wiring, BCM |
