Engine Controls - Self-Diagnostics
- Introduction
- Self-Diagnostic System
- Test Equipment
- Summary
- Diagnostic Trouble Code Definitions
- Diagnostic Tests
- Notes
- DTC P0031: Ho2S Heater (Front) Circuit Low
- DTC P0032: Ho2S Heater (Front) Circuit High
- DTC P0037: Ho2S Heater (Rear) Circuit Low
- DTC P0038: Rear Ho2S Heater Circuit High
- DTC P0101: Mass Airflow Sensor Circuit Range/Performance Problem
- DTC P0102: Mass Airflow Sensor Circuit, Low Input
- DTC P0103: Mass Airflow Sensor Circuit, High Input
- DTC P0106: BARO Circuit, Performance Problem
- DTC P0107: BARO Circuit, Low Input
- DTC P0108: BARO Circuit, High Input
- DTC P0111: Intake Air Temperature Sensor Circuit, Performance Problem
- DTC P0112: Intake Air Temperature Sensor Circuit, Low Input
- DTC P0113: Intake Air Temperature Sensor Circuit, High Input
- DTC P0117: Engine Coolant Temperature Sensor Circuit, Low Input
- DTC P0118: Engine Coolant Temperature Sensor Circuit, High Input
- DTC P0121: Throttle Position Sensor Circuit, Range/Performance Problem
- DTC P0122: Throttle Position Sensor Circuit, Low Input
- DTC P0123: Throttle Position Sensor Circuit, High Input
- DTC P0125: Insufficient Coolant Temperature For Closed Loop Fuel Control
- DTC P0126: Coolant Thermostat Stuck Open
- DTC P0128: Coolant Thermostat Stuck Open
- DTC P0131: Ho2S (Front) No Inversion, Low Voltage Stuck
- DTC P0132: Ho2S (Front) No Inversion, High Voltage Stuck
- DTC P0133: Ho2S (Front) Circuit, Slow Response
- DTC P0134: Ho2S (Front) Circuit, No Activity Detected
- DTC P0138: Ho2S (Rear) Circuit, High Input
- DTC P0140: Ho2S (Rear) Circuit, No Activity Detected
- DTC P0171: Fuel Trim, Too Lean
- DTC P0172: Fuel Trim, Too Rich
- DTC P0300: Random Misfire Detected
- DTC P0301-P0304: Cylinders No. 1-4 Misfire Detected
- DTC P0325: Knock Sensor Circuit Malfunction
- DTC P0335: Crankshaft Position Sensor Circuit Malfunction
- DTC P0340: Camshaft Position Sensor Circuit Malfunction
- DTC P0401: EGR System, Insufficient Flow
- DTC P0402: EGR System, Excessive Flow
- DTC P0421: Catalyst System, Efficiency Below Threshold
- DTC P0442: EVAP Control System, Small Leak Detected
- DTC P0443: EVAP Control System Purge Control Valve, Circuit Malfunction
- DTC P0451: Fuel Tank Pressure Sensor, Performance Problem
- DTC P0452: EVAP Control System Pressure Sensor, Low Input
- DTC P0453: EVAP Control System Pressure Sensor, High Input
- DTC P0455: EVAP Control System Leak Detected, Blockage Or Large Leak
- DTC P0456: EVAP Control System Leak Detected, Very Small Leak
- DTC P0461: Fuel Gauge Sending Unit Circuit, Range/Performance Problem
- DTC P0462: Fuel Gauge Sending Unit Circuit, Low Input
- DTC P0463: Fuel Gauge Sending Unit Circuit, High Input
- DTC P0464: Fuel Gauge Sending Unit Circuit, Slosh Check
- DTC P0480: Cooling Fan Relay Circuit
- DTC P0500: Vehicle Speed Sensor Malfunction
- DTC P0505: Idle Air Control Valve Circuit Malfunction
- DTC P0506: Idle Control System, Rpm Less Than Expected
- DTC P0507: Idle Control System, Rpm Greater Than Expected
- DTC P0550: Power Steering Pressure Switch Circuit Malfunction
- DTC P0660: Variable Inertia Charging System Solenoid Valve Circuit Malfunction
- DTC P0703: Brake Switch Input Circuit Malfunction
- DTC P0704: Clutch Switch Input Circuit Malfunction
- DTC P0705: Neutral Switch Input Circuit Malfunction
- DTC P1250: Pressure Regulator Control Solenoid Valve Malfunction
- DTC P1449: Canister Drain Cut Valve Open Or Short
- DTC P1450: EVAP Control System Malfunction, Excessive Vacuum
- DTC P1487: EGR Boost Sensor Solenoid Valve Circuit Malfunction
- DTC P1496: EGR Valve Solenoid Coil No. 1 Open Or Short
- DTC P1497: EGR Valve Solenoid Coil No. 2 Open Or Short
- DTC P1498: EGR Valve Solenoid Coil No. 3 Open Or Short
- DTC P1499: EGR Valve Solenoid Coil No. 4 Open Or Short
- DTC P1512: Variable Tumble Control System Stuck Closed
- DTC P1562: Pcm +BB Voltage Low
- DTC P1569: Variable Tumble Control System Solenoid Valve Circuit, Low Input
- DTC P1570: Variable Tumble Control System Solenoid Valve Circuit, High Input
- DTC P1631: Generator Output Voltage Signal, No Electricity
- DTC P1632: Battery Voltage Circuit Malfunction
- DTC P1633: Battery Overcharge
- DTC P1634: Generator Terminal "B" Circuit Open
- Reference Voltage Test