GM OBD/OBD2 Codes >> GM 93-94 5.7L VIN P

GM

93-94 5.7L VIN P
Flash CodeFault LocationProbable Cause
12Start of diagnosisNo engine speed (RPM) signal received
13Oxygen sensor (O2S), bank 1Wiring open circuit, O2S, 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
16 Distributor ignition system, low resolution signal – circuit malfunctionWiring, distributor, ECM
17 Camshaft position (CMP) sensor – circuit malfunctionWiring, CMP sensor, mechanical fault, ECM
18 Injector(s) – circuit malfunctionWiring, injector(s)
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
24 Vehicle speed sensor (VSS)Wiring, VSS, ECM
25Intake air temperature (IAT) sensor – high temperatureWiring short circuit to ground, IAT sensor, ECM
26 (1994) Evaporative emission (EVAP) canister purge valve – open/short circuitWiring, EVAP canister purge valve, ECM
26 (1993) Engine control module (ECM), quad driver/output driver – circuit malfunctionWiring, ECM controlled components, ECM
27 (1993)Engine control module(ECM), quad driver/output driver – circuit malfunctionWiring, ECM controlled components, ECM
27 (1994)Exhaust gas recirculation (EGR) solenoidWiring, poor connections, EGR valve, ECM
28 (1993)Engine control module(ECM), quad driver/output driver – circuit malfunctionWiring, ECM controlled components, ECM
28 (1994)Transmission range (TR) switchWiring, TR switch, ECM
29Secondary air injection (AIR) pump relay – circuit malfunctionWiring, AIR pump relay, 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 Idle air control (IAC) valveWiring, IAC valve, intake system leaking, fuel system, PCV valve, A/C system, mechanical fault, ECM
36Distributor ignition system, high resolution signal – circuit malfunctionWiring, distributor, 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 Clutch pedal position (CPP) switchWiring, incorrectly adjusted, CPP switch, ECM
41Ignition control, timing signal – circuit malfunctionWiring, poor connections, ICM, ECM
42Ignition control, bypass signal – circuit malfunctionWiring, poor connections, ICM, ECM
43Knock sensor (KS)Wiring open circuit/short circuit to ground/short to positive, KS, ECM
44Oxygen sensor (O2S)/heated oxygen sensor (HO2S), bank 1 – mixture leanWiring open circuit/short circuit to ground, injector(s) blocked, fuel contamination, fuel pressure low, exhaust system leaking, O2S, ECM
45Oxygen sensor (O2S)/heated oxygen sensor (HO2S), bank 1 – mixture richWiring open circuit, injector(s) leaking, fuel pressure high, EVAP purge valve, TP sensor, O2S, EGR system, ECM
46 Immobilizer system, code – malfunctionIncorrect key, ECM
47 Knock control module, removable part in engine control module (ECM) – circuit malfunctionWiring, poor connection, missing knock control module, ECM
48 Mass airflow (MAF) sensor – no signalWiring, poor connections, MAF sensor, ECM
51Engine control module (ECM) – PROMInsecure PROM, incorrect PROM, ECM
52 Engine oil temperature sensor – voltage highWiring, engine oil temperature sensor, ECM
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)Ground wiring open circuit, insecure PROM, ECM
58 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 A/C system – performanceRefrigerant low, wiring, A/C refrigerant pressure sensor, A/C evaporator temperature sensor, ECM
62 Engine oil temperature sensor – voltage lowWiring, engine oil temperature sensor, ECM
63 Oxygen sensor (O2S)/heated oxygen sensor (HO2S), bank 2Wiring open circuit, O2S/HO2S, ECM
64 Oxygen sensor (O2S)/heated oxygen sensor (HO2S), bank 2 – mixture leanWiring open circuit/short circuit to ground, injector(s) blocked, fuel contamination, fuel pressure low, exhaust system leaking, O2S, ECM
65 Oxygen sensor (O2S)/heated oxygen sensor (HO2S), bank 2 – mixture richWiring open circuit, injector(s) leaking, fuel contamination, fuel pressure high, TP sensor, EGR system, EVAP purge valve, O2S, ECM
66A/C refrigerant pressure sensor – voltage lowWiring open circuit/short circuit to ground, A/C refrigerant pressure sensor, ECM
67A/C refrigerant pressure sensor – circuit malfunctionWiring open circuit, A/C refrigerant pressure sensor, ECM
68 A/C compressor clutch relay – circuit malfunctionWiring short circuit, A/C compressor clutch relay, ECM
69 A/C compressor clutch relay – circuit malfunctionWiring open circuit, A/C compressor clutch relay, ECM
70A/C refrigerant pressure sensor – voltage highWiring open circuit/short circuit to positive, A/C refrigerant pressure sensor, ECM
71A/C evaporator temperature sensor – voltage highWiring open circuit/short circuit to positive, A/C evaporator temperature sensor
72Vehicle Speed Sensor (VSS)Wiring open circuit/short circuit to ground, VSS, ECM
73Transmission fluid pressure (TFP) control solenoid – circuit malfunctionWiring, poor connections, TFP solenoid
74 Traction control system (TCS), active signal – malfunctionWiring short to ground, ABS/TCS, ECM
75System voltage, engine control module (ECM) – lowWiring, battery, alternator, ECM
76Exhaust gas recirculation (EGR) valve solenoid 2Wiring open circuit/short circuit to ground, supply wire, EGR valve, ECM
77Engine coolant blower motor relay – circuit malfunctionWiring, engine coolant blower blower motor relay, ECM
78Engine coolant blower motor relay 2 – circuit malfunctionWiring open circuit/short circuit to ground/short circuit to positive, engine coolant blower motor relay, ECM
79Transmission fluid temperature (TFT) – highTransmission mechanical fault, towing weight limit exceeded
80Torque converter clutch (TCC) – slippingWiring open circuit/short circuit to ground, supply wire, transmission internal wiring, TCC solenoid, transmission mechanical fault, ECM
81 Transmission shift solenoid (SS), 2nd-3rd – circuit malfunctionWiring, SS, ECM
82 Transmission shift solenoid (SS), 1st-2nd – circuit malfunctionWiring, SS, ECM
83 Reverse gear inhibit solenoid – circuit malfunctionWiring, reverse gear inhibit solenoid, ECM
84 Transmission 3rd-2nd control solenoid – circuit malfunctionWiring, control solenoid, ECM
84 2nd-3rd gear inhibit relay – circuit malfunctionWiring, inhibit relay, ECM
85Torque converter clutch (TCC) solenoid – stuck ONWiring open circuit/short circuit to ground, transmission internal wiring, TCC solenoid, transmission mechanical fault, ECM
86Engine control module (ECM) – analogue/digital converterA/C refrigerant pressure sensor/KS/ECT sensor/fuel pump monitor circuit short circuit to battery voltage
87Engine control module (ECM), EEPROM – malfunctionPoor connections, incorrect programming, ECM
90Torque converter clutch (TCC) – circuit malfunctionWiring, TCC solenoid, ECM
91Skip shift warning lamp – circuit malfunctionWiring, skip shift warning lamp, ECM
93Transmission fluid pressure (TFP) control solenoid – circuit malfunctionWiring, poor connection, TFP solenoid
95Change oil lamp – circuit malfunctionWiring open circuit/short circuit to ground/short circuit to positive, instrument panel, engine oil life lamp bulb, ECM
96Engine control module (ECM) – ignition supply voltage lowWiring open circuit, alternator, ECM
97Engine control module (ECM), vehicle speed sensor (VSS) output signal – circuit malfunctionWiring, poor connections, ECM
98Engine control module (ECM) – incorrectly codedECM incorrectly coded, ECM
99 Engine control module (ECM), tachometer output signal – circuit malfunctionWiring, poor connections, ECM
 
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