GM OBD/OBD2 Codes >> GM 92-93 1.6L VIN 6

GM

92-93 1.6L VIN 6
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 – voltage high/lowWiring, ECT sensor, ECM
15Engine coolant temperature (ECT) sensor – voltage highWiring open circuit, ECT sensor, ECM
16 System voltage – high/lowWiring, battery, alternator
17 Camshaft position (CMP) sensor – circuit malfunctionWiring, CMP sensor, mechanical fault, ECM
19 Crankshaft position (CKP) sensor, 7X/58X signal – circuit malfunctionWiring, CKP sensor, ECM
21Throttle position (TP) sensor – voltage high/lowWiring, TP sensor, ECM
22Throttle position (TP) sensor – voltage lowWiring open circuit/short circuit to ground, TP sensor, ECM
23Intake air temperature (IAT) sensor – voltage high/lowWiring, IAT sensor, ECM
24Vehicle speed sensor (VSS) – no signalWiring, VSS, ECM
25Intake air temperature (IAT) sensor – voltage lowWiring short circuit to ground, IAT sensor, ECM
26Engine control module (ECM), quad driver/output driver – circuit malfunctionWiring, ECM controlled components, ECM
27Engine control module (ECM), quad driver/output driver – circuit malfunctionWiring, ECM controlled components, ECM
28Engine control module (ECM), quad driver/output driver – circuit malfunctionWiring, ECM controlled components, ECM
29Engine control module (ECM), quad driver/output driver – circuit malfunctionWiring, ECM controlled components, ECM
31 Transmission range (TR) switch – malfunctionWiring, TR switch, ECM
32Exhaust gas recirculation (EGR) solenoidWiring, poor connections, EGR valve, ECM
33Manifold absolute pressure (MAP) sensor – voltage high/lowWiring, hose blocked/leaking, MAP sensor, ECM
34Manifold absolute pressure (MAP) sensor – voltage lowWiring open circuit/short circuit to ground, MAP sensor, ECM
35 Idle air control (IAC) valveWiring, IAC valve, intake system leaking, fuel system, PCV valve, A/C system, mechanical fault, ECM
36Crankshaft position (CKP) sensor, at crankshaft pulley – 24X signal circuit malfunctionWiring, CKP sensor, ECM
39 Clutch pedal position (CPP) switchWiring, incorrectly adjusted, CPP switch, ECM
41 Engine control module (ECM), programming – malfunctionECM incorrect programming, ECM failure
42Ignition control, timing signal – circuit malfunctionWiring, poor connections, ICM, ECM
43Knock sensor (KS) – circuit malfunctionWiring, KS, 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 Immobilizer system, code – malfunctionIncorrect key, ECM
51Engine control module (ECM) – PROMPoor connections, incorrect programming, ECM
52 Engine control module (ECM) – malfunctionECM
53 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 Engine control module (ECM) – malfunctionECM
61 Oxygen sensor (O2S) – malfunctionO2S
62 Transmission gear switch signal circuitWiring open circuit/short circuit to ground, 2nd gear switch, 3rd gear switch, ECM
65 Injector(s) – circuit malfunctionWiring, injector(s)
66A/C refrigerant pressure sensor – voltage lowWiring open circuit/short circuit to ground/short circuit to positive, A/C refrigerant pressure sensor, ECM
70A/C refrigerant pressure sensor – voltage highWiring open circuit/short circuit to positive, A/C refrigerant pressure sensor, ECM
72CAN data bus, ECM to instrumentation control module – lost communicationWiring, poor connections, instrumentation control module, ECM
75Exhaust gas recirculation (EGR) solenoid 1 – circuit malfunctionWiring, EGR valve, ECM
76Exhaust gas recirculation (EGR) solenoid 2 – circuit malfunctionWiring, EGR valve, ECM
77Exhaust gas recirculation (EGR) solenoid 3 – circuit malfunctionWiring, EGR valve, ECM
79Vehicle speed sensor (VSS) – voltage highWiring, VSS, ECM
80Vehicle speed sensor (VSS) – voltage highWiring, VSS, ECM
81 Brake pedal position (BPP) switch, TCC – circuit malfunctionWiring, BPP switch, ECM
82 Crankshaft position (CKP) sensor, in cylinder block – 3X signal circuit malfunctionWiring open circuit/short circuit to ground, CKP sensor, ICM
85 Engine control module (ECM), PROM – malfunctionPoor connections, incorrect programming, ECM
86 Engine control module (ECM), analogue/digital converterA/C refrigerant pressure sensor/knock sensor (KS)/engine coolant temperature (ECT) sensor/fuel pump monitor circuit short circuit to battery voltage
87 Engine control module (ECM), EEPROM – malfunctionPoor connections, incorrect programming, ECM
 
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