GM GM Achieva/Alero/Cutlass Trouble Code Info

GM

Various Models
Flash code Fault location Probable cause
P0000-0999 Refer to OBD-II trouble code table
P1133 Heated oxygen sensor (HO2S)/oxygen sensor (O2S) 1 – insufficient switching Wiring, oxygen sensor heater, exhaust system leaking, HO2S
P1137 Heated oxygen sensor (HO2S)/oxygen sensor (O2S) 2 – insufficient switching Wiring, HO2S/O2S, ECM
P1138 Heated oxygen sensor (HO2S)/oxygen sensor (O2S) 2 – insufficient switching Wiring, HO2S/O2S, ECM
P1171 Fuel system – lean during acceleration Fuel filter, fuel pump, HO2S/O2S, injectors
P1336 Crankshaft position sensor (CKP) – variation not learned learning procedure not performed
P1380 Rough road signal – signal error ABS control module trouble code(s) stored
P1381 Rough road signal – no communication from antilock brake system (ABS) CAN data bus Wiring open circuit, ABS system
P1404 Exhaust gas recirculation (EGR) valve – stuck open Wiring open circuit/short circuit to positive, 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, EGR valve position sensor, EGR valve
P1441 Evaporative emission (EVAP) system – leak detected Hose connection(s), EVAP canister, EVAP canister purge valve
P1520 Park/neutral position (PNP) switch Wiring short to ground, incorrectly adjusted
P1601 CAN data bus – circuit malfunction Wiring open circuit/short circuit to ground/short circuit to positive, instrument panel, ECM
P1621 Engine control module (ECM) – memory performance ECM
P1626 Data bus, immobilizer Wiring, body control module (BCM) trouble code(s) stored
P1627 Engine control module (ECM) 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 code learning 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
P1680 Engine control module (ECM) ECM
P1681 Engine control module (ECM) ECM
P1683 Engine control module (ECM) ECM
U1016 Instrument panel, CAN data bus – communication malfunction Wiring open circuit/short circuit to ground/short circuit to positive, instrument panel, ECM