GM GM 93-95 5.7L VIN P Firebird Trouble Code Info

GM

93-95 5.7L VIN P
Flash Code Fault Location Probable Cause
11 Malfunction indicator lamp (MIL) – circuit malfunction Wiring open circuit/short circuit to ground, MIL, ECM
12 Start of diagnosis No engine speed (RPM) signal received
13 Oxygen sensor (O2S)/heated oxygen sensor (HO2S), bank 1 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 Distributor ignition system, low resolution signal – circuit malfunction Wiring, distributor, ECM
18 Injector(s) – circuit malfunction Wiring, injector(s)
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, VSS, ECM
25 Intake air temperature (IAT) sensor – high temperature Wiring short circuit to ground, IAT sensor, ECM
26 Engine control module (ECM), quad driver/output driver – circuit malfunction Wiring, ECM controlled components, ECM
27 Engine control module (ECM), quad driver/output driver – circuit malfunction Wiring, ECM controlled components, ECM
28 (1993 Firebird) Engine control module (ECM), quad driver/output driver – circuit malfunction Wiring, ECM controlled components, ECM
28 (1994 Firebird) Transmission gear pressure switch, signal – circuit malfunction Wiring open circuit/short circuit to ground, reverse/D1/D2/D3/D4 gear pressure switch(es), ECM
29 Secondary air injection (AIR) pump relay – circuit malfunction Wiring, AIR pump relay, ECM
32 Exhaust gas recirculation (EGR) solenoid Wiring open circuit/short circuit to ground, EGR valve, ECM
33 Manifold absolute pressure (MAP) sensor – voltage high/low Wiring, hose blocked/leaking, MAP sensor, ECM
34 Manifold absolute pressure (MAP) sensor – voltage low Wiring open circuit/short circuit to ground, MAP sensor, ECM
36 Distributor ignition system, high resolution signal – circuit malfunction Wiring, distributor, ECM
37 Brake pedal position (BPP) switch for torque converter clutch (TCC) – high voltage Wiring short circuit to positive, incorrectly adjusted, BPP switch, BPP switch, ECM
38 Brake pedal position (BPP) switch/ torque converter clutch (TCC) – low voltage Wiring open circuit, supply wire, BPP switch, ECM
41 Ignition control, reference signal – circuit malfunction Wiring open circuit, poor connections, ICM, ECM
42 Ignition control, reference signal – circuit malfunction Wiring short to ground, ICM, ECM
43 Knock sensor (KS) – circuit malfunction Wiring, KS, ECM
44 Oxygen sensor (O2S)/heated oxygen sensor (HO2S), bank 1 – mixture lean Wiring open circuit/short circuit to ground, injector(s) blocked, fuel contamination, fuel pressure low, exhaust system leaking, O2S, ECM
45 Oxygen sensor (O2S)/heated oxygen sensor (HO2S), bank 1 – mixture rich Wiring open circuit, injector(s) leaking, fuel pressure high, EVAP purge valve, TP sensor, O2S, EGR system, ECM
46 Immobilizer system, code – malfunction Incorrect key, ECM
47 Knock control module, removable part in engine control module (ECM) – circuit malfunction Wiring, poor connection, missing knock control module, ECM
48 Mass airflow (MAF) sensor – no signal Wiring, poor connections, MAF sensor, ECM
50 System voltage – low Alternator
51 Engine control module (ECM) – PROM Poor connections, incorrect programming, ECM
53 System Voltage – high Alternator
55 Engine control module (ECM), fuel lean monitor Fuel filter/lines blocked, fuel contamination
58 Transmission fluid temperature (TFT) sensor – voltage low Wiring short circuit to ground, TFT sensor, ECM
59 Transmission fluid temperature (TFT) sensor -voltage high Wiring open circuit, TFT sensor, ECM
61 A/C system – performance Refrigerant low, wiring, A/C refrigerant pressure sensor, A/C evaporator temperature sensor, ECM
63 Oxygen sensor (O2S)/heated oxygen sensor (HO2S), bank 2 Wiring open circuit, O2S/HO2S, ECM
64 Oxygen sensor (O2S)/heated oxygen sensor (HO2S), bank 2 – mixture lean Wiring 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 rich Wiring open circuit, injector(s) leaking, fuel contamination, fuel pressure high, TP sensor, EGR system, EVAP purge valve, O2S, ECM
66 A/C refrigerant pressure sensor – voltage low Wiring open circuit/short circuit to ground, A/C refrigerant pressure sensor, ECM
67 A/C refrigerant pressure sensor – circuit malfunction Wiring open circuit, A/C refrigerant pressure sensor, ECM
68 A/C compressor clutch relay – circuit malfunction Wiring short circuit, A/C compressor clutch relay, ECM
69 A/C compressor clutch relay – circuit malfunction Wiring open circuit, A/C compressor clutch relay, ECM
70 A/C compressor clutch relay, control signal – circuit malfunction Wiring, A/C compressor clutch relay, ECM
71 A/C evaporator temperature sensor – voltage high Wiring, poor connections, A/C evaporator temperature sensor
72 Vehicle Speed Sensor (VSS) Wiring, VSS, ECM
73 Transmission fluid pressure (TFP) control solenoid – circuit malfunction Wiring, poor connections, TFP solenoid
74 Traction control system (TCS), active signal – malfunction Wiring short to ground, ABS/TCS, ECM
75 System voltage, engine control module (ECM) – low Wiring, battery, alternator, ECM
77 Engine coolant blower motor relay – circuit malfunction Wiring, engine coolant blower blower motor relay, ECM
79 Transmission fluid temperature (TFT) – high Transmission mechanical fault, towing weight limit exceeded
80 Torque converter clutch (TCC) – slipping Wiring 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 malfunction Wiring, SS, ECM
82 Transmission shift solenoid (SS), 1st-2nd – circuit malfunction Wiring, SS, ECM
83 Reverse gear inhibit solenoid – circuit malfunction Wiring, reverse gear inhibit solenoid, ECM
84 (Automatic) Transmission 3rd-2nd control solenoid – circuit malfunction Wiring, control solenoid, ECM
84 (Manual) Skip shift solenoid – circuit malfunction Wiring, skip shift solenoid, ECM
85 Torque converter clutch (TCC) solenoid – stuck ON Wiring open circuit/short circuit to ground, transmission internal wiring, TCC solenoid, transmission mechanical fault, ECM
90 Torque converter clutch (TCC) – circuit malfunction Wiring, TCC solenoid, ECM
91 Skip shift warning lamp – circuit malfunction Wiring, skip shift warning lamp, ECM
97 Engine control module (ECM), vehicle speed sensor (VSS) output signal – circuit malfunction Wiring, poor connections, ECM
99 Engine control module (ECM), tachometer output signal – circuit malfunction Wiring, poor connections, ECM