GM GM 92-93 3.8L VIN L Eighty Eight/Ninety Eight/Regency/Silhouette/Toronado/Trofeo Trouble Code Info

GM

1992-1993 3.8L VIN L
Flash code Fault location Probable cause
12 Start of diagnosis No engine speed (RPM) signal received
13 Oxygen sensor (02S) Wiring open circuit, 02S, ECM
14 Engine coolant temperature (ECT) sensor – high temperature indicated Wiring short circuit to ground, ECT sensor, ECM
15 Engine coolant temperature (ECT) sensor – low temperature indicated Wiring open circuit, ECT sensor, ECM
16 Battery voltage – high/low Wiring, alternator
17 Spark reference circuit Wiring open circuit/short circuit to ground, ICM, ECM
18 Camshaft position (CMP) signal/fuel control signal Wiring open circuit/short circuit to ground, CKP sensor, CMP sensor, ICM, ECM
21 Throttle position (TP) sensor – voltage high Wiring open circuit/short circuit to positive, TP sensor, ECM
22 Throttle position (TP) sensor -voltage low Wiring open circuit/short circuit to ground, TP sensor, ECM
23 Intake air temperature (IAT) sensor – low temperature indicated Wiring open circuit, IAT sensor, ECM
24 Vehicle speed sensor (VSS) Wiring open circuit/short circuit to ground, VSS, ECM
25 Intake air temperature (IAT) sensor – high temperature indicated Wiring short circuit to ground, IAT sensor, ECM
26 Engine control module (ECM), quad driver/ output driver -circuit malfunction Wiring, ECM controlled components, ECM
31 Park/neutral position (PNP) switch Wiring short circuit to ground, incorrectly adjusted, PNP switch, ECM
32 Exhaust gas recirculation (EGR) solenoid Wiring open circuit/short circuit to ground, supply wire, EGR valve, ECM
34 Mass airflow (MAF) sensor Wiring open circuit/short circuit to ground/short circuit to positive, MAF sensor, ECM
36 Shift solenoids (SS) Wiring open circuit/short circuit to ground, SS
38 Brake pedal position (BPP) switch Wiring open circuit/short circuit to ground/short circuit to positive, incorrectly adjusted, BPP switch, ECM
39 Torque converter clutch (TCC) Wiring open circuit/short circuit to ground, TCC solenoid, BPP switch incorrectly adjusted, transmission mechanical fault, ECM
41 Camshaft position (CMP) sensor Wiring, CMP sensor, mechanical fault, ECM
42 Ignition control module (ICM) – circuit malfunction Wiring open circuit/short circuit to ground, ICM, ECM
43 Knock sensor (KS) Wiring open circuit/short circuit to ground/short circuit to positive, KS incorrectly fitted, KS, insecure PROM, ECM
44 Oxygen sensor (02S) – mixture lean Wiring open circuit/short circuit to ground, injector(s) blocked, fuel contamination, fuel pressure low, exhaust system leaking, 02S, ECM
45 Oxygen sensor (02S) – mixture rich Wiring open circuit, fuel pressure high, injector(s) leaking, 02S, 02S contamination, EVAP canister purge valve, TP sensor, EGR system, ECM
51 Engine control module (ECM) – PROM Insecure PROM, incorrect PROM, ECM
53 Exhaust gas recirculation (EGR) valve solenoid 1 Wiring open circuit/short circuit to ground, supply wire, EGR valve, ECM
54 Exhaust gas recirculation (EGR) valve solenoid 2 Wiring open circuit/short circuit to ground, supply wire, EGR valve, ECM
55 Exhaust gas recirculation (EGR) valve solenoid 3 Wiring open circuit/short circuit to ground, supply wire, EGR valve, ECM
56 Engine control module quad driver/output driver Wiring, ECM controlled components, ECM
58 Immobilizer control module – fuel enable signal Incorrect ignition key, wiring open circuit/short circuit to ground/short circuit to positive, immobilizer control module, ECM
61 Cruise control vent solenoid Wiring open circuit/short circuit to ground/short circuit to positive, cruise control vent solenoid, cruise control servo, ECM
62 Cruise control vacuum solenoid Wiring open circuit/short circuit to ground/short circuit to positive, cruise control vacuum solenoid, cruise control servo, ECM
63 Cruise control servo – servo position sensor low Hoses leaking, cruise control servo
65 Cruise control servo position sensor – circuit malfunction Wiring open circuit/short circuit to ground/short circuit to positive, cruise control servo, ECM
66 Low A/C refrigerant charge Low A/C refrigerant charge, wiring open circuit/short circuit to ground/short circuit to positive, A/C refrigerant low pressure switch, ECM
67 Cruise control switch – circuit malfunction Wiring open circuit/short circuit to ground/short circuit to positive, cruise control switch, ECM
68 Cruise control servo – servo position sensor high Hoses blocked/leaking, brake pedal vacuum valve, cruise control servo
69 A/C refrigerant pressure switch – engine coolant blower motors Wiring open circuit, A/C refrigerant pressure switch, ECM
99 Cruise control – power management mode Cruise control accelerator cable adjustment, hoses blocked, brake pedal vacuum valve, cruise control servo