Oldsmobile Achieva – Bravada – Cutlass – Eighty Eight – Ninety Eight/Regency – Silhouette Trouble Code Info

Model Year Engine identification System
Achieva  3.1 L 1996-97 VIN  position 8 = M   GM
Bravada 4.2L 2002-04 VIN  position 8  = S   GM
Bravada 4.3L 1996-02 VIN  position 8 = W   GM
Cutlass Ciera/Cruiser 3.1 L 1994-96 VIN  position 8 = M   GM
Cutlass Supreme 3.1 L 1996-97 VIN  position 8 = M GM
Cutlass Supreme 3.4L 1994-97 VIN  position 8  = X GM
Eighty Eight 3.8L 1994-97 VIN  position  8 =  1/K/L GM
Ninety Eight/Regency 3.8L 1994-96 VIN  position  8 =  1/L GM
Silhouette 3.4L 1996-97 VIN  position 8 =  E GM
Silhouette 3.8L 1994-95 VIN  position 8 =  L GM

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.

Accessing

  • Trouble codes can only be displayed by using a Scan Tool connected to the data link connector (DLC).
  • 12 pin connector [1]:
  1. o Cutlass Supreme –> 1995.
  2. o Cutlass Ciera/Cruiser –> 1995.
  3. o Silhouette –>1995.
Achieva---Bravada1Achieva---Bravada2 16 pin connector [2] :
o Cutlass Supreme 1996 –>.
o Cutlass Ciera/Cruiser 1996–>.
o Silhouette 1996–>.
o Achieva.
o Aurora.
o Bravada.
o Eighty eight.
o Ninety eight.
o Regency.

Erasing

12 pin connector

NOTE: Disconnecting battery ground lead may cause driveability problems until the engine management system relearns basic values.
  • Ensure ignition switched OFF.
  • Disconnect battery ground cable for 30 seconds.
  • Reconnect battery ground cable.
  • Repeat checking procedure to ensure no trouble codes remain in ECM fault memory.
NOTE: Disconnecting battery ground lead may also erase memory from electronic units, such as radio.
• Trouble codes can also be erased by using a Scan Tool connected to the data link connector (DLC).

16 pin connector

  • 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)

Trouble code  identification

Scan code Fault location Probable cause
PO,P2,UO Refer to OBO-II trouble code tables
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 toohigh Wiring open circuit/short circuit to positive, MAPsensor, ECM
P1111 Intake air temperature (IAT) sensor -circuitintermittent -voltage high Wiring open circuit, ground lead defective
P1112 Intake air temperature (IAT) sensor -circuitintermittent -voltage low Wiring short circuit to ground
P1114 Engine coolant temperature (ECT) sensor circuitmalfunction -voltage low Wiring short circuit to ground
P1115 Engine coolant temperature (ECT) sensor circuitmalfunction -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
P1120 Throttle motor position sensor 1 -circuit malfunction Wiring open circuit/short circuit to ground! short circuit to positive, throttle control unit, ECM
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
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
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
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
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
P1336 Crankshaft position (CKP) sensor -variation notlearned 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) -IC circuit, voltage high Wiring open circuit, ICM, ECM
P1361 Ignition control module (ICM) -IC circuit, voltage low Wiring short circuit to ground, ICM, 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
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
P1404 Exhaust gas recirculation (EGR) valve solenoid 2 Wiring open circuit/short circuit to ground, supply wire, EGR valve, ECM
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 groundl short circuit to positive, 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, ECT sensor, 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 -low rpm Wiring open circuit/short circuit to groundl short circuit to positive, lAC valve, throttle valve tight/sticking
P1509 Idle air control (lAC) valve -high rpm Wiring open circuit/short circuit to groundl short circuit to positive, lAC valve, throttle valve tight/sticking
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 PNP switch
P1523 Throttle control unit, throttle position during battery saving mode Throttle valve movement restricted, throttle control unit, ECM
P1530 AlC refrigerant pressure switch -engine coolant blower motors Wiring open circuit, AlC refrigerant pressure switch, ECM
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
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
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
P1565 Cruise control servo position sensor -circuit malfunction Wiring open circuit/short circuit to ground! short circuit to positive, cruise control servo, ECM
P1567 Cruise control switch -circuit malfunction Wiring open circuit/short circuit to ground! short circuit to positive, cruise control switch, ECM
P1568 Cruise control servo -servo position sensor high Hoses blockedlleaking, brake pedal vacuum valve, cruise control servo
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
P1599 Cruise control -power management mode Cruise control accelerator cable adjustment, hoses blocked, brake pedal vacuum valve, cruise control servo
P1600 Engine control module (ECM) 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) -memory performance ECM
P1623 Engine control module (ECM) -PROM Insecure PROM, incorrectly coded
P1626 Immobilizer control module Wiring, body control module (BCM) 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 Battery voltage highllow Wiring, alternator
P1630 Engine control module (ECM), ignition supply voltage Fuse, wiring open circuit, ECM
P1631 Engine control module (ECM) -incorrect immobilizer code Incorrect key, immobilizer code not programmed
P1633 Engine control module (ECM), ignition supply voltage Fuse, 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
P1639 Sensor supply voltage -circuit B malfunction Wiring short circuit to ground/positive, ground wiring open circuit, AlC refrigerant pressure sensor, fuel tank pressure (FTP) sensor, ECM
P1640 Engine control module, quad driver/output driver Wiring, ECM [[!]
P1641 Malfunction indicator lamp (MIL) -circuit malfunction Wiring open circuit/short circuit to ground, MIL,supply wire, ECM
P1642 Secondary air injection (AIR) pump/solenoid relay -circuit malfunction Wiring open circuit/short circuit to ground/ short circuit to positive, AIR pump/solenoid relay
P1643 Fuel pump control module -circuit malfunction Wiring open circuit/short circuit to ground/ short circuit to positive, fuel pump control module, ECM
P1645 Supercharger (SC) control valve solenoid -circuit malfunction Wiring open circuit/short circuit to ground, SC control valve solenoid, ECM
P1650 Engine control module, quad driver/output driver Wiring, ECM [[!]
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 Fuel gauge tank sensor -circuit malfunction Wiring open circuit/short circuit to ground! short circuit to positive, instrument panel, ECM
P1653 Traction control system (TCS) -delivered torque circuit Wiring open circuit/short circuit to ground! shortcircuit to positive, ABS control module trouble code(s) stored, ECM
P1654 AlC compressor clutch relay -circuit malfunction Wiring open circuit/short circuit to ground, AlC compressor clutch relay, ECM
P1655 Evaporative emission (EVAP) canister purge valve -circuit malfunction Wiring open circuit/short circuit to ground, EVAP canister vent valve, 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, quad driver/output driver Wiring, ECM iI!l
P1671 Engine oil change warning lamp -circuit malfunction Wiring open circuit/short circuit to ground! short circuit to positive, engine oil change warning lamp, ECM
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
P1860 Torque converter clutch (TCC) solenoid -circuitmalfunction Wiring open circuit/short circuit to ground, TCC solenoid, 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