GM OBD/OBD2 Codes >> GM 92-95 3.1L VIN T/M

GM

92-95 3.1L VIN T/M
Flash CodeFault LocationProbable Cause
12Start of diagnosisNo engine speed (RPM) signal received
13Oxygen sensor (O2S)/heated oxygen sensor (HO2S)Wiring open circuit, O2S/HO2S, ECM
14Engine coolant temperature (ECT) sensor – high temperature indicatedWiring short circuit to ground, ECT sensor, ECM
15Engine coolant temperature (ECT) sensor – low temperature indicatedWiring open circuit, ECT sensor, ECM
16Battery voltage – high or lowWiring, alternator, ECM
16 (Beretta/Corsica (1992-1993))Vehicle speed sensor (VSS) buffer – signal lowWiring, VSS buffer, ECM
17 (Regal VIN T)Spark reference circuitWiring open circuit/short circuit to ground, ICM, ECM
17 (Regal VIN M)Camshaft position (CMP) sensorWiring open circuit/short circuit to ground/short circuit to positive, ignition feed circuit, CMP sensor, mechanical fault, ECM
17 (Beretta/Corsica)Camshaft position (CMP) sensor – circuit malfunctionWiring, CMP sensor, mechanical fault, ECM
18 (Regal)Camshaft position (CMP) signal/crankshaft position (CKP) signal errorWiring open circuit/short circuit to ground, CKP sensor, CMP sensor, crankshaft pulley/balancer
19 (Regal)Crankshaft position (CKP) sensor intermittent 7x signalWiring, CKP sensor, PROM, ECM
21Throttle position (TP) sensor – voltage highWiring open circuit/short circuit to positive, TP sensor, ECM
22Throttle position (TP) sensor – voltage lowWiring open circuit/short circuit to ground, TP sensor, ECM
23Intake air temperature (IAT) sensor – low temperatureWiring open circuit, IAT sensor, ECM
24Vehicle speed sensor (VSS)Wiring open circuit/short circuit to ground, PROM, VSS, ECM
25Intake air temperature (IAT) sensor – high temperatureWiring short circuit to ground, IAT sensor, ECM
26 (Regal)Engine control module quad driver/output driverWiring open circuit/short circuit to ground/short circuit to positive, ECM controlled components, ECM (*see below for additional information)
27 (Regal)Engine control module quad driver/output driverWiring open circuit/short circuit to ground/short circuit to positive, ECM controlled components, ECM (*see below for additional information)
28 (Regal VIN T)Engine control module quad driver/output driverWiring open circuit/short circuit to ground/short circuit to positive, ECM controlled components, ECM (*see below for additional information)
28               (Regal VIN M & Beretta/Corsica)Transmission range (TR) switchWiring open circuit/short circuit to ground/short circuit to positive, TR switch, ECM
29 (Regal)Transmission gear switch signal circuit 4th gearWiring open circuit/short circuit to ground, 4th gear switch, ECM
31 (Regal)Park/neutral position (PNP) switchWiring open circuit/short circuit to ground, incorrectly adjusted, PNP switch, ECM
31 (Beretta/Corsica)Engine speed control system – malfunctionWiring, throttle valve motor, throttle valve control module, ECM
32Exhaust gas recirculation (EGR) solenoidWiring open circuit/short circuit to ground, EGR valve, ECM
33Manifold absolute pressure (MAP) sensor – circuit malfunctionWiring open circuit/short circuit to positive, hose blocked/leaking, MAP sensor, ECM
34Manifold absolute pressure (MAP) sensor – circuit malfunctionWiring open circuit/short circuit to ground, MAP sensor, ECM
35 (Regal)Idle speed control (ISC) system – malfunctionWiring open circuit/short circuit to ground/short circuit to positive, IAC valve, ECM
35 (Beretta/Corsica)Idle air control (IAC) valveWiring, IAC valve, intake system leaking, fuel system, PCV valve, A/C system, mechanical fault, ECM
36 (Regal VIN T)Shift solenoids (SS)Wiring open circuit/short circuit to ground, SS
36               (Regal VIN M & Beretta/Corsica)24X crankshaft position sensor (CKP) – circuit malfunctionWiring open circuit/short circuit to ground, 24X CKP sensor, ignition feed circuit, ECM
37Brake pedal position (BPP) switch for torque converter clutch (TCC)Wiring open circuit/short circuit to ground, incorrectly adjusted BPP switch, BPP switch, ECM
38Brake pedal position (BPP) switch/ torque converter clutch (TCC)Wiring open circuit/short circuit to ground, supply wire, BPP switch, TCC switch, ECM
39 (Regal)Torque converter clutch (TCC)Wiring open circuit/short circuit to ground, TCC solenoid, BPP switch, cooling fan fuse, transmission mechanical fault, ECM
39 (Beretta/Corsica)Brake pedal position (BPP) switch – stuck OFFWiring, BPP switch, ECM
41 (Regal VIN T & Beretta/Corsica (1992-1993))Engine control module (ECM) – PROMInsecure PROM, incorrect PROM, ECM
41 (Regal VIN M & Beretta/Corsica (1994-1995))Ignition control module (ICM) – electronic spark timing (EST)/ignition control (IC) circuit malfunctionWiring open circuit, ICM, ECM
42Ignition control module (ICM) – electronic spark timing (EST)/ignition control (IC)/bypass circuit malfunctionWiring open circuit/short circuit to ground, ICM, ECM
43Knock sensor (KS)Wiring open circuit/short circuit to ground/short to positive, KS, PROM, ECM
44Oxygen sensor (O2S)/heated oxygen sensor (HO2S) – mixture leanWiring short circuit to ground, fuel pressure low, MAP sensor, misfire, fuel contamination, exhaust system leaking, O2S/HO2S, ECM
45Oxygen sensor (O2S)/heated oxygen sensor (HO2S) – mixture richFuel pressure high, injector(s) leaking, O2S contamination, EVAP canister purge valve, TP sensor, MAP sensor, EGR system, O2S/H2OS, ECM
46 (Regal)Immobilizer control module – fuel enable signalIncorrect ignition key, wiring open circuit/short circuit to ground/short circuit to positive, immobilizer control module, ECM
46 (Beretta/Corsica)Immobilizer system, code – malfunctionIncorrect key, ECM
51Engine control module (ECM) – PROMInsecure PROM, incorrect PROM, ECM
52 (Beretta/Corsica)Engine control module (ECM) – malfunctionECM
53 (Regal VIN M)Battery Voltage – high/lowWiring open circuit, alternator, ECM
53 (Beretta/Corsica)System Voltage – highAlternator
54Fuel pump circuit – voltage lowWiring open circuit/short circuit to ground, fuel pump relay, fuel pump, engine oil pressure warning lamp switch, ECM
55 (Regal VIN T & Beretta/Corsica)Engine control module (ECM)Ground wiring open circuit, insecure PROM, ECM
56 (Regal)Engine control module quad driver/output driverWiring, ECM controlled components, ECM
57 (Regal)Boost control problemWiring short circuit to ground, hoses blocked/leaking, boost bypass actuator, boost control solenoid, ECM
58 (Regal VIN T)Immobilizer control module – fuel enable signalIncorrect ignition key, wiring open circuit/short circuit to ground/short circuit to positive, immobilizer control module, ECM
58 (Regal VIN M & Beretta/Corsica)Transmission fluid temperature (TFT) sensor – voltage lowWiring short circuit to ground, TFT sensor, ECM
59Transmission fluid temperature (TFT) sensor -voltage highWiring open circuit, TFT sensor, ECM
61 (Regal VIN M)Cruise control vent solenoidWiring open circuit/short circuit to ground/short to positive, cruise control servo, ECM
61 (Regal VIN T)Oxygen sensor (O2S)/heated oxygen sensor (H2OS)O2S/H2OS
61 (Beretta/Corsica)Oxygen sensor (O2S)O2S
62 (Regal VIN M)Cruise control vacuum solenoidWiring open circuit/short circuit to ground/short to positive, cruise control servo, ECM
62 (Regal VIN T & Beretta/Corsica)Transmission gear switch signal circuitWiring open circuit/short circuit to ground, 2nd gear switch, 3rd gear switch, ECM
63 (Regal)Cruise control servo position sensor – circuit malfunctionWiring open circuit/short circuit to ground/short to positive, hoses leaking, cruise control servo, ECM
65 (Regal)Cruise control servo position sensor – circuit malfunctionWiring open circuit/short circuit to ground/short to positive, cruise control servo, ECM
66A/C refrigerant pressure sensor – circuit malfunctionWiring open circuit/short circuit to ground/short circuit to positive, A/C refrigerant pressure sensor, ECM
67 (Regal)Cruise control switch – circuit malfunctionWiring open circuit/short circuit to positive, cruise control switch, brake pedal vacuum valve, ECM
68 (Regal)Cruise control servo – servo position sensor highHoses blocked, brake pedal vacuum valve, cruise control servo, cruise control cable binding
68 (Beretta/Corsica)Torque converter clutch (TCC) – slippingWiring, TCC solenoid, transmission mechanical fault, ECM
69 (Regal)A/C refrigerant pressure switch – engine coolant blower motorsWiring short circuit to ground, A/C refrigerant pressure switch, ECM
69 (Beretta/Corsica)Torque converter clutch (TCC) solenoid – stuck ONWiring open circuit/short circuit to ground, transmission internal wiring, TCC solenoid, transmission mechanical fault, ECM
70A/C refrigerant pressure sensor – voltage highWiring open circuit/short circuit to positive, A/C refrigerant pressure sensor, ECM
72Vehicle Speed Sensor (VSS)Wiring open circuit/short circuit to ground, VSS, ECM
73 (Beretta/Corsica)Transmission fluid pressure (TFP) control solenoid – circuit malfunctionWiring, poor connection, TFP solenoid
74 (Beretta/Corsica)Transmission input shaft speed sensor – circuit malfunctionWiring, input shaft speed sensor, ECM
75Exhaust gas recirculation (EGR) valve solenoid 1Wiring open circuit/short circuit to ground, supply wire, EGR valve, ECM
76Exhaust gas recirculation (EGR) valve solenoid 2Wiring open circuit/short circuit to ground, supply wire, EGR valve, ECM
77Exhaust gas recirculation (EGR) valve solenoid 3Wiring open circuit/short circuit to ground, supply wire, EGR valve, ECM
79Transmission fluid temperature (TFT) – highTransmission mechanical fault, towing
80Torque converter clutch (TCC) – slippingWiring open circuit/short circuit to ground, supply wire, transmission internal wiring, TCC solenoid, transmission mechanical fault, ECM
81 (Beretta/Corsica)Transmission shift solenoid (SS), 2nd-3rd – circuit malfunctionWiring, SS, ECM
82 (Regal)Ignition control module (ICM) – 3X reference circuit malfunctionWiring open circuit/short circuit to ground, supply wire, CKP signal sensor, ICM, ECM
82 (Beretta/Corsica)Crankshaft position (CKP) sensor, in cylinder block – 3X signal circuit malfunctionWiring open circuit/short circuit to ground, CKP sensor, ICM
83 (Beretta/Corsica)Torque converter clutch (TCC) solenoid, pulse width modulated – circuit malfunctionWiring, TCC solenoid, ECUM
85Engine control module (ECM) – PROMInsecure PROM, incorrectly coded
86Engine control module (ECM) – analogue/digital converterA/C refrigerant pressure sensro/KS/ECT sensor/fuel pump monitor circuit short circuit to battery voltage
87Engine control module (ECM) – PROM errorInsecure PROM, incorrectly coded
87 (Beretta/Corsica)Engine control module (ECM), EEPROM – malfunctionPoor connections, incorrect programming, ECM
90Torque converter clutch (TCC) – stuck ONWiring open circuit/short circuit to ground, transmission internal wiring, TCC solenoid, transmission mechanical fault, ECM
96Engine control module (ECM) – ignition supply voltage lowWiring open circuit, alternator, ECM
98Engine control module (ECM) – incorrectly codedECM incorrectly coded, ECM
99 (Regal VIN T)Cruise control – power management modeHoses blocked, brake pedal vacuum valve, cruise control servo, cruise control cable binding
99 (Regal VIN M & Beretta/Corsica)Engine control module (ECM) – incorrectly codedECM incorrectly coded, ECM
* Depending on model, year and equipment level, the following components may be connected to this circuit. Use of the vehicle wiring diagram is recommended to confirm which components are fitted.
A/C compressor clutch relayExhaust gas recirculation (EGR) solenoid
A/C condenser blower motor relayMalfunction indicator lamp (MIL)
Engine coolant blower motor relayTransmission shift warning light (MT)
Engine coolant ‘hot’ warning lampTorque converter clutch (TCC) solenoid
Evaporative emission (EVAP) canister purgeTransmission shift solenoids (SS)
Subscribe
Notify of
guest

This site uses Akismet to reduce spam. Learn how your comment data is processed.

0 Comments
Inline Feedbacks
View all comments