GM OBD/OBD2 Codes >> GM 92 2.5L VIN R TBI

GM

92 2.5L VIN R TBI
Flash CodeFault LocationProbable Cause
12Start of diagnosisNo engine speed (RPM) signal received
13Oxygen sensor voltage stays between 0.35 and 0.55 volts for 3 seconds during closed loop operation and will set code after 40 seconds for Century and Cutlass Ciera. For the Lumina the oxygen sensor voltage stays between 0.35 and 0.55 volts for 60 seconds during closed loop operation and will set code after 2 minutes. Both systems can go into open loop after 15 seconds.Wiring open circuit, O2S/HO2S, ECM
14Coolant temperature sensor signal indicates a temperature of over 275° F for 3 seconds.Wiring short circuit to ground, ECT sensor, ECM
15Coolant temperature sensor signal indicates a temperature colder than -22° F after the engine has been running for 2 minutes.Wiring open circuit, ECT sensor, ECM
16Battery voltage – high or lowWiring, alternator, ECM
17Spark reference circuitWiring open circuit/short circuit to ground, ICM, ECM
17 CHEVROLET LuminaCamshaft position (CMP) sensor – circuit malfunctionWiring, CMP sensor, mechanical fault, ECM
18Camshaft position (CMP) signal/crankshaft position (CKP) signal errorWiring open circuit/short circuit to ground, CKP sensor, CMP sensor, crankshaft pulley/balancer
18 CHEVROLET LuminaCamshaft position (CMP) signal/fuel control signalWiring open circuit/short circuit to ground, CKP sensor, CMP sensor, ICM, ECM
19Crankshaft position (CKP) sensor intermittent 7x signalWiring, CKP sensor, PROM, ECM
21TPS voltage was above 2.5 volts for 2 seconds when the MAP sensor signal showed manifold vacuum to be 15 pounds or more under 1800 RPM.Wiring open circuit/short circuit to positive, TP sensor, ECM
22TPS voltage was under 0.2 volts for 2 seconds when the engine was running.Wiring open circuit/short circuit to ground, TP sensor, ECM
23Inlet ATS signal showed an air temperature of -22° F after the engine has been running for 1 minute.Wiring open circuit, IAT sensor, ECM
24Throttle position signal was less than 2% with engine speed between 1400 and 4400 RPM and the MAP signal showed low voltage and high manifold vacuum. Transmission was not in park or neutral.Wiring open circuit/short circuit to ground, PROM, VSS, ECM
24 CHEVROLET LuminaVehicle Speed Sensor (VSS)- no signalWiring, VSS, ECM
25Inlet ATS signal showed an air temperature over 275° F for more than 2 seconds after the engine has been running for 5 minutes and vehicle speed was greater than 44 MPH.Wiring short circuit to ground, IAT sensor, ECM
26Engine control module quad driver/output driverWiring open circuit/short circuit to ground/short circuit to positive, ECM controlled components, ECM (*see below for additional information)
27Engine control module quad driver/output driverWiring open circuit/short circuit to ground/short circuit to positive, ECM controlled components, ECM (*see below for additional information)
28Engine control module quad driver/output driverWiring open circuit/short circuit to ground/short circuit to positive, ECM controlled components, ECM (*see below for additional information)
28 CHEVROLET LuminaTransmission range (TR) switch – malfunctionWiring, TR switch, ECM
29 BUICK CenturyTransmission gear switch signal circuit 4th gearWiring open circuit/short circuit to ground, 4th gear switch, ECM
31Park/neutral position (PNP) switchWiring open circuit/short circuit to ground, incorrectly adjusted, PNP switch, ECM
31 CHEVROLET LuminaTransmission range (TR) switch – malfunctionWiring, TR switch, ECM
32EGR open command did not change the fuel mixture when the command was given during off idle operation. EGR opening should cause the mixture to be slightly richer because of the low oxygen content of exhaust gas.Wiring open circuit/short circuit to ground, EGR valve, ECM
33MAP sensor signal voltage was too high (low vacuum) for at least 5 seconds when throttle opening was under 2%.Wiring open circuit/short circuit to positive, hose blocked/leaking, MAP sensor, ECM
34MAP sensor signal voltage was too low (high vacuum) when engine speed was under 1200 RPM or when engine speed was over 1200 RPM with throttle opening was over 20%.Wiring open circuit/short circuit to ground, MAP sensor, ECM
35Idle speed was over 150 RPM outside the desired engine speed commanded by the ECM.Wiring open circuit/short circuit to ground/short circuit to positive, IAC valve, ECM
35 CHEVROLET LuminaIdle air control (IAC) valveWiring, IAC valve, intake system leaking, fuel system, PCV valve, A/C system, mechanical fault, ECM
36Shift solenoids (SS)Wiring open circuit/short circuit to ground, SS
36 CHEVROLET LuminaCrankshaft position (CKP) sensor, at crankshaft pulley – 24X signal circuit malfunctionWiring, CKP sensor, 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
39Torque converter clutch (TCC)Wiring open circuit/short circuit to ground, TCC solenoid, BPP switch, cooling fan fuse, transmission mechanical fault, ECM
39 CHEVROLET LuminaClutch pedal position (CPP) switchWiring, incorrectly adjusted, CPP switch, ECM
41Camshaft position (CMP) sensorWiring open circuit/short circuit to ground, CMP sensor, ICM, ECM
41 CHEVROLET LuminaEngine control module (ECM)ECM incorrect programming, ECM failure
42The EST signal did not change when the ECM applied bypass voltage to the ignition module.Wiring open circuit/short circuit to ground, ICM, ECM
43Knock sensor (KS)Wiring open circuit/short circuit to ground/short to positive, KS, PROM, ECM
44Oxygen sensor voltage was under 0.2 volts for 60 seconds of closed loop operation.Wiring short circuit to ground, fuel pressure low, MAP sensor, misfire, fuel contamination, exhaust system leaking, O2S/HO2S, ECM
45Oxygen sensor voltage was above specification. Century and Cutlass Ciera was over 0.75 volts for 50 seconds in a closed loop. Lumina was over 0.7 volts for 30 seconds and throttle angle was between 3% and 45%.Fuel pressure high, injector(s) leaking, O2S contamination, EVAP canister purge valve, TP sensor, MAP sensor, EGR system, O2S/H2OS, ECM
46Immobilizer control module – fuel enable signalIncorrect ignition key, wiring open circuit/short circuit to ground/short circuit to positive, immobilizer control module, ECM
51PROM error.Insecure PROM, incorrect PROM, ECM
52 CHEVROLET LuminaEngine control module (ECM) – malfunctionECM
53Charging system voltage was greater than 16.9 volts for more than 50 seconds. Repair charging system.Wiring open circuit, alternator, ECM
54Exhaust gas recirculation (EGR) valve solenoid 2Wiring open circuit/short circuit to ground, exhaust system blocked, EGR valve, ECM
54 CHEVROLET LuminaFuel pump circuit – voltage lowWiring open circuit/short circuit to ground, fuel pump relay, engine oil pressure warning lamp/fuel pump switch
55 CHEVROLET LuminaEngine control module (ECM) – malfunctionECM
56Engine control module quad driver/output driverWiring, ECM controlled components, ECM
57 BUICK CenturyBoost control problemWiring short circuit to ground, hoses blocked/leaking, boost bypass actuator, boost control solenoid, ECM
58Immobilizer control module – fuel enable signalIncorrect ignition key, wiring open circuit/short circuit to ground/short circuit to positive, immobilizer control module, ECM
58 CHEVROLET LuminaTransmission 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
61Cruise control vent solenoidWiring open circuit/short circuit to ground/short to positive, cruise control servo, ECM
61 CHEVROLET LuminaOxygen sensor (O2S) – malfunctionO2S
62Cruise control vacuum solenoidWiring open circuit/short circuit to ground/short to positive, cruise control servo, ECM
62 CHEVROLET LuminaTransmission gear switch signal circuitWiring open circuit/short circuit to ground, 2nd gear switch, 3rd gear switch, ECM
63Cruise control servo position sensor – circuit malfunctionWiring open circuit/short circuit to ground/short to positive, hoses leaking, cruise control servo, ECM
65Cruise control servo position sensor – circuit malfunctionWiring open circuit/short circuit to ground/short to positive, cruise control servo, ECM
65 CHEVROLET LuminaInjectors- circuit malfunctionWiring open circuit/short circuit to ground/short circuit to positive, injectors, ECM
66 CHEVROLET LuminaA/C refrigerant pressure sensor – voltage lowWiring open circuit/short circuit to ground, A/C refrigerant pressure sensor, ECM
67Cruise control switch – circuit malfunctionWiring open circuit/short circuit to positive, cruise control switch, brake pedal vacuum valve, ECM
68Cruise control servo – servo position sensor highHoses blocked, brake pedal vacuum valve, cruise control servo, cruise control cable binding
69A/C refrigerant pressure switch – engine coolant blower motorsWiring short circuit to ground, A/C refrigerant pressure switch, ECM
70A/C refrigerant pressure sensor – voltage highWiring open circuit/short circuit to positive, A/C refrigerant pressure sensor, ECM
72 BUICK CenturyVehicle Speed Sensor (VSS)Wiring open circuit/short circuit to ground, VSS, ECM
75Exhaust gas recirculation (EGR) valve solenoid 1Wiring open circuit/short circuit to ground, supply wire, EGR valve, ECM
76Exhaust gas recirculation (EGR) valve solenoid 2Wiring open circuit/short circuit to ground, supply wire, EGR valve, ECM
77Exhaust gas recirculation (EGR) valve solenoid 3Wiring open circuit/short circuit to ground, supply wire, EGR valve, ECM
79Transmission fluid temperature (TFT) – highTransmission mechanical fault, towing
79 CHEVROLET LuminaVehicle speed sensor (VSS) – voltage highWiring, VSS, ECM
80Torque converter clutch (TCC) – slippingWiring open circuit/short circuit to ground, supply wire, transmission internal wiring, TCC solenoid, transmission mechanical fault, ECM
80 CHEVROLET LuminaVehicle speed sensor (VSS) – voltage lowWiring, VSS, ECM
81 CHEVROLET LuminaBrake pedal position (BPP) switch for torque converter clutch (TCC) – circuit malfunctionWiring, BPP switch, ECM
82Ignition control module (ICM) – 3X reference circuit malfunctionWiring open circuit/short circuit to ground, supply wire, CKP signal sensor, ICM, ECM
82 CHEVROLET LuminaCrankshaft position (CKP) sensor, in cylinder block – 3X signal circuit malfunctionWiring open circuit/short circuit to ground, CKP sensor, ICM
85Engine control module (ECM) – PROMInsecure PROM, incorrectly coded
86Engine control module (ECM) – analogue/digital converterA/C refrigerant pressure sensro/KS/ECT sensor/fuel pump monitor circuit short circuit to battery voltage
87Engine control module (ECM) – PROM errorInsecure PROM, incorrectly coded
90Torque converter clutch (TCC) – stuck ONWiring open circuit/short circuit to ground, transmission internal wiring, TCC solenoid, transmission mechanical fault, ECM
96Engine control module (ECM) – ignition supply voltage lowWiring open circuit, alternator, ECM
98Engine control module (ECM) – incorrectly codedECM incorrectly coded, ECM
99Cruise control – power management modeHoses blocked, brake pedal vacuum valve, cruise control servo, cruise control cable binding
99 CHEVROLET LuminaCruise control system – engine management has operated in limited power modeThrottle cable sticking, brake vacuum release valve, cruise control actuator
* 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 relayExhaust gas recirculation (EGR) solenoid
A/C condenser blower motor relayMalfunction indicator lamp (MIL)
Engine coolant blower motor relayTransmission shift warning light (MT)
Engine coolant ‘hot’ warning lampTorque converter clutch (TCC) solenoid
Evaporative emission (EVAP) canister purgeTransmission shift solenoids (SS)
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