Chevrolet OBD / OBD2 Codes >> Beretta/Corsica – Cavalier – Lumina – Monte Carlo/Z34

ModelYearEngine identificationSystem
Beretta/Corsica 2.2/3.1 L1996VIN  position 8 = M/4GM
Cavalier 2.2L1996-04VIN  position 8 = F/4GM
Cavalier 2.3/2.4L1992-02VIN  position 8 =  D/TGM
Lumina 3.1L1996-01VIN  position 8 =  T/M/JGM
Lumina 3.4L1994-96VIN  position 8 =  XGM
Lumina APV/Minivan 3.4L1996VIN  position 8 = EGM
Lumina APV/Minivan 3.8L1994-95VIN  position 8 = LGM
Monte Carlo 3.1 L1996-99VIN  position 8 = MGM
Monte Carlo 3.4L2000-05VIN  position 8 = EGM
Monte Carlo 3.8L1998-05VIN  position 8 = K/1GM
Monte Carlo/Z34 3.4L1995-97VIN  position 8 = XGM

General information

  • Refer to the front of this manual for general test conditions, terminology, detailed descriptions of wiring faults and a general trouble shooter for electrical and mechanical faults.
  • 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.


  • Trouble codes can only be displayed by using a Scan Tool connected to the data link connector (DLC) [1] or [2]


  • 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) [1] or [2].

Trouble code  identification

Scan codeFault locationProbable· cause
PO, P2, UORefer to OBO-II trouble code tables
P1106Manifold absolute pressure (MAP) sensor voltage high, intermittentWiring open circuit/short circuit to positive, poor connections
P1107Manifold absolute pressure (MAP) sensor voltagelow, 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) sensorvoltage low, intermittentWiring short circuit to ground, poor connections
P1115Engine coolant temperature (ECT) sensorvoltage 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
P1336Crankshaft position (CKP) sensor -variation notlearnedLearning procedure not performed
P1350Ignition control system, bypass monitor circuitmalfunctionWiring, 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 positive/ ground,poor connections, ICM, ECM
P1362Ignition control, bypass circuit -voltage lowWiring short circuit to positive/ground, ICM, ECM
P1374Crankshaft position (CKP) sensor, high to lowresolution frequency -signal variationWiring, wiring routed near spark plug wires, ignition coils arCing/tracking, ICM, ECM
P1380Antilock brake system (ABS)/traction controlsystem (TCS), rough road signal to enginecontrol module (ECM) -malfunctionABS trouble code(s) stored
P1381Antilock brake system (ABS)/traction controlsystem (TCS), rough road signal to enginecontrol module (ECM) -no communicationWiring, poor connections, ABS
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 2circuit malfunctionWiring, EGR valve, ECM
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
P1442Evaporative emission (EVAP) system vacuum switch -circuit malfunctionHoses blockedlleaking, wiring, EVAP canister, ECM
P1483Engine cooling system -performanceCooling system, ECT sensor, IAT sensor
P1520Park/neutral position (PNP) switch -circuit malfunctionWiring short circuit to ground, PNP switchincorrectly adjusted
P1530A/C refrigerant pressure sensor/switch -circuitmalfunctionWiring, 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 -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, throttle cable sticking, electrical interference
P1561Cruise control, vent solenoid -circuit malfunctionWiring, solenoid valve
P1562Cruise control, vacuum solenoid -circuit malfunctionWiring, solenoid valve
P1565Cruise control servo position sensor -circuit malfunctionWiring, poor connections, servo position sensor
P1567Cruise control master switch -circuit malfunctionWiring, poor connections, cruise control master switch
P1568Cruise control system -performance highWiring, poor connections, throttle cable sticking
P1571Traction control system (TCS), torque request signal -malfunctionWiring, poor connections, ABSITCS
P1573Engine control module (ECM), antilock brake system (ASS)/traction control system (TCS)communication -malfunctionWiring, poor connections, ABS control module, ECM
P1585Cruise control system, inhibit output circuitWiring, poor connections, cruise control motor/actuator, ECM
P1599Cruise control system -engine management has operated in limited power modeThrottle cable sticking, brake vacuum release valve, cruise control actuator, electricalinterference
P1600Engine control module (ECM) -malfunctionECM
P1601CAN data bus, ECM/ASSITCS/instrumentation control module/diagnostic control module some communication lostWiring, poor connections, ECM, ABSITCS, diagnostic control module, instrumentation control module
P1602CAN data bus -antilock brake system (ASS)/ traction control system (TCS)Wiring, ABSITCS control module trouble code(s) stored
P1604CAN data bus -instrument panelWiring, BCM trouble code(s) stored
P1605CAN data bus -A/CWiring, A/C system trouble code(s) stored
P1610CAN data bus -body control module (SCM)Wiring, SCM trouble code(s) stored
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
P1630System voltage high/lowWiring, 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
P1635Engine control module (ECM). sensor supply voltage -circuit malfunctionWiring, poor connections, TP sensor, MAP sensor, EGR valve position sensor, FTP sensor, ECM
P1637Alternator warning lamp. control signal -circuit malfunctionWiring, instrument panel, ECM
P1639Engine control module (ECM). sensor supply voltage -circuit malfunctionWiring. poor connections, A/C refrigerant pressure sensor. FTP sensor. ECM
P1640Engine control module (ECM). quad driverl output driver -circuit malfunctionWiring, ECM controlled components. ECM if]
P1641A/C compressor clutch relay -circuit malfunctionWiring open circuit/short circuit to ground, A/C compressor clutch relay, ECM
P1641Malfunction indicator lamp (MIL) -circuit malfunctionWiring, poor connections, MIL, ECM
P1642Engine oil change warning lamp -circuit malfunctionWiring, ECM
P1642Secondary air injection (AIR) pump relay circuit malfunctionWiring, AIR pump relay, ECM
P1644Traction control system (TCS). delivered torque signal -malfunctionWiring, poor connections, ECM
P1650Engine control module (ECM). quad driverl output driver -circuit malfunctionWiring, ECM controlled components, ECM if]
P1651Engine coolant blower motor relay 1 -circuit malfunctionWiring, engine coolant blower motor relay, ECM
P1652Engine coolant blower motor relay 2 -circuit malfunctionWiring, engine coolant blower motor relay(s), ECM
P1653Fuel gauge. control signal -circuit malfunctionWiring, ECM
P1653Engine oil level ‘low’ warning lamp, control signal -circuit malfunctionWiring short circuit to ground, engine oil level, ECM
P1654A/C 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 driverl output driver -circuit malfunctionWiring, ECM controlled components, ECM if]
P1662Cruise control, inhibit output circuit malfunctionWiring open circuit/short circuit to ground, cruise control motor/actuator, cruise control module, ECM
P1663Engine oil change waming lamp -circuitmalfunctionWiring, instrument panel, ECM
P1663Alternator warning lamp, control signal -circuitmalfunctionWiring, instrument panel, ECM
P1665Evaporative emission (EVAP) canister vent valve -circuit malfunctionWiring open circuit/short circuit to ground, EVAP canister vent valve, ECM
P1670Engine control module (ECM), quad driverl outputdriver -circuit malfunctionWiring, ECM controlled components, ECM IE
P1671Malfunction indicator lamp (MIL) -circuit malfunctionWiring open circuit/short circuit to groundl 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’ waming lamp, control signal -circuit malfunctionWiring, instrument panel, cooling system, ECM
P1674Tachometer -circuit malfunctionWiring open circuit/short circuit to groundl shortcircuit to positive, instrument panel, ECM
P1675Evaporative emission (EVAP) canister vent valve -circuit malfunctionWiring, poor connection, EVAP canister vent valve, ECM
P1676Evaporative emission (EVAP) canister purgevalve -circuit malfunctionWiring open circuit/short circuit to ground, EVAP canister purge valve, ECM
P1680Engine control module (ECM) -malfunctionECM
P1681. Engine 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 -adaptation 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 ‘AlBIC &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 ‘A/B/C & P’ -incorrect signalWiring, TR switch
P1826Transmission range (TR) switch, signal ‘C’ voltage highWiring, TR switch
P1860Torque converter clutch (TCC) solenoid -circuit malfunctionWiring open circuit/short circuit to ground, TCCsolenoid, ECM
P1887Torque converter clutch (TCC) release switch -circuit malfunctionWiring open circuit, TCC solenoid release switch,ECM
U1016CAN data bus, engine control module (ECM)/antilock brake system (ABS)/traction control system (TCS)/instrumentation control modulel diagnostic control module -loss of serial communicationWiring, poor connections, ECM, ABS/TCS, diagnostic control module, instrumentation control module
Use of the vehicle wiring diagram is recommended to confirm which components are fitted.
  •  A/C compressor clutch relay
  •  A/C condenser blower motor relay
  •  Engine coolant blower motor relay
  •  Engine coolant ‘hot’ warning lamp
  •  Evaporative emission (EVAP) canister purge valve
  •  Exhaust gas recirculation (EGR) solenoid
  •  Malfunction indicator lamp (MIL)
  •  Torque converter clutch (TCC) solenoid
  •  Transmission shift solenoids (SS)
  •  Transmission shift warning lamp (MT)