GM GM 92-94 2.3L VIN A Trouble Code Info

GM

92-94 2.3L VIN A
Flash code Fault location Probable cause
12 Start of diagnosis No engine speed (RPM) signal received
13 Oxygen sensor (02S)/heated oxygen sensor (H02S) Wiring open circuit, 02S/H02S, ECM
14 Engine coolant temperature (ECT) sensor -voltage high/low Wiring, ECT sensor, ECM
15 Engine coolant temperature (ECT) sensor -voltage high Wiring open circuit, ECT sensor, ECM
16 Ignition control module (ICM) -2X reference circuit malfunction Wiring open circuit/short circuit to ground/ short circuit to positive, ICM, ECM
17 Camshaft position (CMP) sensor -circuit malfunction Wiring, CMP sensor, mechanical fault, ECM
18 Camshaft position (CMP) signal/fuel control signal Wiring open circuit/short circuit to ground, CKP sensor, CMP sensor, ICM, ECM
19 Crankshaft position (CKP) sensor, 7X signal -circuit malfunction Wiring, CKP sensor, ICM, ECM
21 Throttle position (TP) sensor -voltage high/ low Wiring, 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 -voltage high/low Wiring, IAT sensor, ECM
24 Vehicle speed sensor (VSS) -no signal Wiring, VSS, ECM
25 Intake air temperature (IAT) sensor -voltage low Wiring short circuit to ground, IAT sensor, ECM
26 Engine control module (ECM), quad driver! output driver -circuit malfunction Wiring, ECM controlled components, ECM rn
27 Engine control module (ECM), quad driver! output driver -circuit malfunction Wiring, ECM controlled components, ECM rn
28 (1994) Engine control module (ECM), quad driver! output driver -circuit malfunction Wiring, ECM controlled components, ECM rn
28 (1992-1993) Transmission range (TR) switch -malfunction Wiring, TR switch, ECM
31 Transmission range (TR) switch -malfunction Wiring, TR switch, ECM
32 Exhaust gas recirculation (EGR) solenoid Wiring, poor connections, 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
35 Idle air control (lAC) valve Wiring, lAC valve, intake system leaking, fuel system, PCV valve, A/C system, mechanical fault, ECM
36 Crankshaft position (CKP) sensor, at crankshaft pulley -24X signal circuit malfunction Wiring, CKP sensor, ECM
37 Brake pedal position (BPP) switch for torque converter clutch (TCC) Wiring, incorrectly adjusted, BPP switch, ECM
38 Brake pedal position (BPP) switch for torque converter clutch (TCC) Wiring open circuit/short circuit to ground/ short circuit to positive, BPP switch incorrectly adjusted, BPP switch, ECM
39 Clutch pedal position (CPP) switch Wiring, incorrectly adjusted, CPP switch, ECM
41 Ignition control module (ICM) -1X circuit malfunction Wiring open circuit/short circuit to ground/ short circuit to positive, ICM, ECM
42 Ignition control, bypass/timing signal -circuit malfunction Wiring, poor connections, ICM, ECM
43 Knock sensor (KS)/knock control module -circuit malfunction Wiring, KS, knock control module, ECM
44 Oxygen sensor (02S)/heated oxygen sensor (H02S) -mixture lean Wiring open circuit/short circuit to ground, injector(s) blocked, fuel contamination, fuel pressure low, exhaust system leaking, 02S/H02S, ECM
45 Oxygen sensor (02S)/heated oxygen sensor (H02S) -mixture rich Wiring open circuit, fuel pressure high, injector(s) leaking, 02S/H02S, EVAP purge valve, TP sensor, EGR system, ECM
46 Immobilizer system, code -malfunction Incorrect key, ECM
51 Engine control module (ECM), PROM -malfunction Poor connections, incorrect programming, ECM
52 Engine control module (ECM) -malfunction ECM
53 System voltage -high Alternator
54 Fuel pump circuit -voltage low Wiring open circuit/short circuit to ground, fuel pump relay, engine oil pressure warning lamp/fuel pump switch
55 Engine control module (ECM) -malfunction ECM
55 (1994) Engine control module (ECM), fuel lean monitor Fuel filter/lines blocked, fuel contamination
56 Engine control module (ECM), quad driver/ output driver -circuit malfunction Wiring, ECM controlled components, ECM IE
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 Oxygen sensor (02S) -malfunction 02S
62 Transmission gear switch signal circuit Wiring open circuit/short circuit to ground, 2nd gear switch, 3rd gear switch, ECM
63 Cruise control servo -servo position sensor low Hoses leaking, cruise control servo
65 Injectors -circuit malfunction Wiring open circuit/short circuit to ground/ short circuit to positive, injectors, ECM
66 A/C refrigerant pressure sensor -voltage low Wiring open circuit/short circuit to ground, A/C refrigerant pressure sensor, ECM
67 Cruise control switch -circuit malfunction Wiring open circuit/short circuit to ground/ short circuit to positive, cruise control switch, ECM
68 Cruise control servo -servo position sensor high Hoses blocked/leaking, brake pedal vacuum valve, cruise control servo
69 A/C refrigerant pressure switch, engine coolant blower motors Wiring open circuit, A/C refrigerant pressure switch, ECM
70 A/C refrigerant pressure sensor -voltage high Wiring open circuit/short circuit to positive, A/C refrigerant pressure sensor, ECM
75 Exhaust gas recirculation (EGR) solenoid 1 -circuit malfunction Wiring, EGR valve, ECM
76 Exhaust gas recirculation (EGR) solenoid 2 -circuit malfunction Wiring, EGR valve, ECM
77 Exhaust gas recirculation (EGR) solenoid 3 -circuit malfunction Wiring, EGR valve, ECM
81 Brake pedal position (BPP) switch for torque converter clutch (TCC) -circuit malfunction Wiring, BPP switch, ECM
82 Crankshaft position (CKP) sensor, in cylinder block -3X signal circuit malfunction Wiring open circuit/short circuit to ground, CKP sensor, ICM
85 Engine control module (ECM), PROM -malfunction Poor connections, incorrect programming, 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) -stuck ON Wiring open circuit/short circuit to ground, transmission internal wiring, TCC solenoid, transmission mechanical fault, ECM
96 Engine control module (ECM) -ignition supply voltage low Wiring open circuit, alternator, ECM
98 Engine control module (ECM) – incorrectly coded ECM incorrectly coded, ECM
99 Cruise control system – engine management has operated in limited power mode Throttle cable sticking, brake vacuum release valve, cruise control actuator