93-95 4.3L VIN W
|
Flash Code |
Fault Location |
Probable Cause |
12 |
Start of diagnosis |
No engine speed (RPM) signal received |
13 |
Oxygen sensor (O2S), bank 1 |
Wiring open circuit, O2S, 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 |
17 |
Camshaft position (CMP) sensor – circuit malfunction |
Wiring, CMP sensor, mechanical fault, 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
|
Evaporative emission (EVAP) canister purge valve – open/short circuit |
Wiring, EVAP canister purge valve, ECM |
27 |
Exhaust gas recirculation (EGR) solenoid |
Wiring, poor connections, EGR valve, ECM |
28 |
Transmission range (TR) switch |
Wiring, TR switch, 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 – circuit malfunction |
Wiring open circuit/short circuit to positive, hose blocked/leaking, MAP sensor, ECM |
34 |
Manifold absolute pressure (MAP) sensor – circuit malfunction |
Wiring open circuit/short circuit to ground, MAP sensor, ECM |
35 |
Idle air control (IAC) valve |
Wiring, IAC valve, intake system leaking, fuel system, PCV valve, A/C system, mechanical fault, ECM |
36 |
Distributor ignition system, high resolution signal – circuit malfunction |
Wiring, distributor, ECM |
37 |
Brake pedal position (BPP) switch for torque converter clutch (TCC) |
Wiring open circuit/short circuit to ground, incorrectly adjusted BPP switch, BPP switch, ECM |
38 |
Brake 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) switch |
Wiring, incorrectly adjusted, CPP switch, ECM |
41 |
Ignition control, timing signal – circuit malfunction |
Wiring, poor connections, ICM, ECM |
42 |
Ignition control, bypass signal – circuit malfunction |
Wiring, poor connections, ICM, ECM |
43 |
Knock sensor (KS) |
Wiring open circuit/short circuit to ground/short to positive, 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 |
51 |
Engine control module (ECM) – PROM |
Insecure PROM, incorrect PROM, ECM |
52 |
Engine oil temperature sensor – voltage high |
Wiring, engine oil temperature sensor, ECM |
53 |
System Voltage – high |
Alternator |
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 |
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 |
62 |
Engine oil temperature sensor – voltage low |
Wiring, engine oil 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 refrigerant pressure sensor – voltage high |
Wiring open circuit/short circuit to positive, A/C refrigerant pressure sensor, ECM |
71 |
A/C evaporator temperature sensor – voltage high |
Wiring open circuit/short circuit to positive, A/C evaporator temperature sensor |
72 |
Vehicle Speed Sensor (VSS) |
Wiring open circuit/short circuit to ground, 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 |
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 – circuit malfunction |
Wiring, engine coolant blower 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 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 |
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 (Automatic)
|
Transmission 3rd-2nd control solenoid – circuit malfunction |
Wiring, control solenoid, ECM |
84 (Manual)
|
2nd-3rd gear inhibit relay – circuit malfunction |
Wiring, inhibit relay, 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 |
86 |
Engine control module (ECM) – analogue/digital converter |
A/C refrigerant pressure sensor/KS/ECT sensor/fuel pump monitor circuit short circuit to battery voltage |
87 |
Engine control module (ECM), EEPROM – malfunction |
Poor connections, incorrect programming, 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 |
93 |
Transmission fluid pressure (TFP) control solenoid – circuit malfunction |
Wiring, poor connection, TFP solenoid |
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 |
97 |
Engine control module (ECM), vehicle speed sensor (VSS) output signal – circuit malfunction |
Wiring, poor connections, ECM |
98 |
Engine control module (ECM) – incorrectly coded |
ECM incorrectly coded, ECM |
99 |
Engine control module (ECM), tachometer output signal – circuit malfunction |
Wiring, poor connections, ECM |