GM GM 92-93 5.7L VIN 7 Trouble Code Info

GM

92-93 5.7L VIN 7
Flash Code Fault Location Probable Cause
11 Malfunction indicator lamp (MIL) – circuit malfunction Wiring open circuit/short circuit to ground, MIL, supply wire, ECM
12 Start of diagnosis No engine speed (RPM) signal received
13 Oxygen sensor (O2S)/heated oxygen sensor ((HO2S) Wiring open circuit, O2S/HO2S, 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 or low Wiring, alternator, ECM
17 Spark reference circuit Wiring open circuit/short circuit to ground, ICM, ECM
18 Injector(s) – circuit malfunction Wiring open circuit/short circuit to ground, supply wire, injectors, ECM
19 7X reference – circuit malfunction Wiring, CKP sensor, PROM, 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 Wiring open circuit, IAT sensor, ECM
24 Vehicle speed sensor (VSS) Wiring open circuit/short circuit to ground, PROM, VSS, ECM
25 Intake air temperature (IAT) sensor – high temperature Wiring short circuit to ground, IAT sensor, ECM
26 Engine control module quad driver/output driver Wiring open circuit/short circuit to ground/short circuit to positive, ECM controlled components, ECM (*see below for additional information)
27 Exhaust gas recirculation (EGR) vacuum control – circuit malfunction Wiring open circuit/short circuit to ground/short circuit to positive, EGR valve, ECM
28 Transmission range (TR) pressure switch Wiring open circuit/short circuit to ground, ECM
29 Secondary air injection (AIR) system Wiring open circuit/short circuit to ground/short circuit to positive, AIR valve relay, ECM
31 Park/neutral position (PNP) switch Wiring open circuit/short circuit to ground, incorrectly adjusted, PNP switch, ECM
32 Exhaust gas recirculation (EGR) solenoid Wiring open circuit/short circuit to ground, EGR valve, ECM
33 Manifold absolute pressure (MAP) sensor – circuit malfunction Wiring open circuit/short circuit to positive, hose blocked/leaking, MAP sensor, ECM
34 Mass air flow (MAF) sensor – circuit malfunction Wiring open circuit/short circuit to ground/short circuit to positive, MAF sensor, ECM
35 Idle air control (IAC) valve Wiring open circuit/short circuit to ground/short circuit to positive, intake system leaking, mechanical fault, IAC valve, ECM
36 Shift solenoids (SS) Wiring open circuit/short circuit to ground, SS
37 Brake switch stuck ON Wiring open circuit/short circuit to ground/short circuit to positive, brake switch, ECM
38 Brake pedal position (BPP) switch Wiring open circuit/short circuit to ground/short circuit to positive, BPP switch incorrectly adjusted, BPP switch, ECM
39 Torque converter clutch (TCC) – circuit malfunction Wiring open circuit/short circuit to ground, TCC solenoid, BPP switch, cooling fan fuse, transmission mechanical fault, ECM
41 Camshaft position (CMP) sensor Wiring open circuit/short circuit to ground, CMP sensor, ICM, ECM
42 (Model Year 1992) Ignition control module (ICM) – electronic spark timing (EST)/ignition control (IC)/bypass circuit malfunction Wiring open circuit/short circuit to ground, ICM, ECM
42 (Model Year 1993) Ignition control module (ICM) – electronic spark timing (EST)/ignition control (IC)/bypass circuit malfunction Wiring open circuit/short circuit to ground, DI control module, ECM
43 (Model Year 1992) Knock sensor (KS) Wiring open circuit/short circuit to ground/short to positive, KS, PROM, ECM
43 (Model Year 1993) Knock sensor (KS) Wiring open circuit/short circuit to ground/short to positive, KS Module, KS, ECM
44 Oxygen sensor (O2S)/heated oxygen sensor (HO2S) Wiring short circuit to ground, fuel pressure low, fuel contamination, exhaust system leaking, O2S/HO2S, ECM
45 Oxygen sensor (O2S)/heated oxygen sensor (HO2S) – mixture rich Fuel pressure high, injector(s) leaking, shield wiring open circuit, O2S contamination, EVAP canister purge valve, TP sensor, MAP sensor, EGR system, excessive fuel in engine oil, ECM
46 Immobilizer control module – fuel enable signal Incorrect ignition key, wiring open circuit/short circuit to ground/short circuit to positive, immobilizer control module, ECM
47 Body control module (BCM), CAN data bus – communication malfunction Wiring, PROM, BCM
48 (Model Year 1992) Mass air flow (MAF) sensor – circuit malfunction Wiring open circuit/short circuit to ground/short circuit to positive, MAF sensor, ECM
48 (Model Year 1993) Misfire Ignition system, fuel system, O2S
50 System voltage low Wiring open circuit/short circuit to ground, alternator, ECM
51 Engine control module (ECM) – PROM Insecure PROM, incorrect PROM, ECM
53 System voltage high Alternator, ECM
54 Fuel pump circuit – voltage low Wiring open circuit/short circuit to ground, fuel pump relay, fuel pump, engine oil pressure warning lamp switch, ECM
55 Engine control module (ECM) Ground wiring open circuit, insecure PROM, 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
59 Transmission fluid temperature (TFT) sensor -low temperature indicated Wiring open circuit, TFT sensor, ECM
61 Cruise control vent solenoid Wiring open circuit/short circuit to ground/short to positive, cruise control servo, ECM
62 Cruise control vacuum solenoid Wiring open circuit/short circuit to ground/short to positive, cruise control servo, ECM
63 Cruise control servo position sensor – circuit malfunction Wiring open circuit/short circuit to ground/short to positive, hoses leaking, cruise control servo, ECM
64 Heated oxygen sensor (H2OS) bank 2 – mixture lean Wiring short circuit to ground, injector(s) blocked, fuel contamination, fuel pressure low, exhaust system leaking, ECM
65 Cruise control servo position sensor – circuit malfunction Wiring open circuit/short circuit to ground/short to positive, cruise control servo, ECM
66 A/C refrigerant pressure sensor circuit – open or short circuit Wiring open circuit/short circuit to ground/short circuit to positive, A/C refrigerant pressure sensor, ECM
67 Cruise control switch – circuit malfunction Wiring open circuit/short circuit to positive, cruise control switch, brake pedal vacuum valve, ECM
68 Cruise control servo – servo position sensor high Hoses blocked, brake pedal vacuum valve, cruise control servo, cruise control cable binding
69 A/C compressor clutch relay – circuit malfunction Wiring open circuit, A/C compressor clutch relay, ECM
70 A/C refrigerant pressure sensor – voltage high Wiring open circuit/short circuit to ground/short circuit to positive, A/C compressor clutch relay, ECM
72 Vehicle Speed Sensor (VSS) – circuit malfunction Wiring open circuit/short circuit to ground, VSS, ECM
73 Pressure control solenoid – circuit malfunction Wiring open circuit/short circuit to ground/short circuit to positive, ECM
75 Transmission system – voltage low Supply wire, alternator, ECM
76 Exhaust gas recirculation (EGR) valve solenoid 2 Wiring open circuit/short circuit to ground, supply wire, EGR valve, ECM
77 Engine coolant blower motor relay 1 – circuit malfunction Wiring open circuit/short circuit to ground/short circuit to positive, engine coolant blower motor relay, ECM
78 Engine coolant blower motor relay 2 – circuit malfunction Wiring open circuit/short circuit to ground/short circuit to positive, engine coolant blower motor relay, ECM
79 Transmission fluid – overtemp Wiring open circuit/short circuit to ground, TFT sensor, ECM
80 Transmission component – slipping Wiring open circuit/short circuit to ground/short circuit to positive, TR pressure switch, transmission mechanical fault, ECM
81 Transmission shift solenoid (SS), 2nd-3rd – circuit malfunction Wiring open circuit/short circuit to ground, shift solenoid, ECM
82 Ignition control module (ICM) – 3X reference circuit malfunction Wiring open circuit/short circuit to ground, supply wire, CKP signal sensor, ICM, ECM
82 Transmission shift solenoid (SS), 1st-2nd – circuit malfunction Wiring open circuit/short circuit to ground, shift solenoid, ECM
83 Torque converter clutch (TCC) solenoid, pulse width modulated – circuit malfunction Wiring open circuit/short circuit to ground/short circuit to positive, TCC solenoid, ECM
84 Transmission shift solenoid (SS), 3rd-2nd – circuit malfunction Wiring open circuit/short circuit to ground, shift solenoid, ECM
85 Torque converter clutch (TCC) – stuck ON Wiring open circuit/short circuit to ground, transmission mechanical fault, TCC solenoid
86 ECM analog/digital – signal error Wiring short to positive, A/C refrigerant pressure sensor, KS, ECT sensor, other DTC codes
87 Engine control module (ECM) – EEPROM Insecure EEPROM, incorrect EEPROM, ECM
90 Torque converter clutch (TCC) solenoid – circuit malfunction Wiring open circuit/short circuit to ground, TCC solenoid, ECM
95 Change oil lamp – circuit malfunction Wiring open circuit/short circuit to ground/short circuit to positive, instrument panel, engine oil life lamp bulb, ECM
96 Engine oil level warning lamp – circuit malfunction Wiring open circuit/short circuit to ground/short circuit to positive, instrument panel, engine oil level lamp bulb, oil level sensor, ECM
98 Engine control module (ECM) – incorrectly coded ECM incorrectly coded, ECM
97 Vehicle speed sensor (VSS) – circuit malfunction Wiring open circuit/short circuit to ground/short circuit to positive, VSS, ECM
98 Invalid ECM program ECM
99 Invalid ECM program 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 relay Exhaust gas recirculation (EGR) solenoid
A/C condenser blower motor relay Malfunction indicator lamp (MIL)
Engine coolant blower motor relay Transmission shift warning light (MT)
Engine coolant ‘hot’ warning lamp Torque converter clutch (TCC) solenoid
Evaporative emission (EVAP) canister purge Transmission shift solenoids (SS)