Diagnostics: Engine

How To Proceed With Troubleshooting Customer Problem Analysis Check Pre-Check Diagnostic Trouble Code Chart Parts Location Terminals Of ECM Problem Symptoms Table P0100 Mass Air Flow Circuit Malfunction P0101 Mass Air Flow Circuit Range/performance Problem P0110 Intake Air Temp. Circuit Malfunction P0115 Engine Coolant Temp. Circuit Malfunction P0116 Engine Coolant Temp. Circuit Range/performance Problem P0120 Throttle/pedal Position Sensor/switch 'A' Circuit Malfunction P0121 Throttle/pedal Position Sensor/switch 'A' Circuit Range/performance Problem P0125 Insufficient Coolant Temp. For Closed Loop Fuel Control P0128 Thermostat Malfunction P0136 Oxygen Sensor Circuit Malfunction P0141 Oxygen Sensor Heater Circuit Malfunction P0171, P0172 System Too Lean P0300, P0301, P0302, P0303, P0304, P0305, P0306 Cylinder 6 Misfire Detected P0325, P0330 Knock Sensor 2 Circuit Malfunction P0335 Crankshaft Position Sensor 'A' Circuit Malfunction P0340 Camshaft Position Sensor Circuit Malfunction P0420 Catalyst System Efficiency Below Threshold P0440, P0442 Evaporative Emission Control System Leak Detected P0441, P0446 Evaporative Emission Control System VENT Control Malfunction P0450, P0451 Evaporative Emission Control System Pressure Sensor Range/performance P0500 Vehicle Speed Sensor Malfunction P0505 Idle Control System Malfunction P1120 Accelerator Pedal Position Sensor Circuit Malfunction P1121 Accelerator Pedal Position Sensor Range/performance Problem P1125 Throttle Control Motor Circuit Malfunction P1126 Magnetic Clutch Circuit Malfunction P1127 ETCS Actuator Power Source Circuit Malfunction P1128 Throttle Control Motor Lock Malfunction P1129 Electric Throttle Control System Malfunction P1130 A/F Sensor Circuit Range/performance Malfunction P1133 A/F Sensor Circuit Response Malfunction P1135 A/F Sensor Heater Circuit Malfunction P1300 Igniter Circuit Malfunction P1335 Crankshaft Position Sensor Circuit Malfunction P1520 Stop Light Switch Signal Malfunction P1600 ECM Batt Malfunction P1633 ECM Malfunction P1780 Park/neutral Position Switch Malfunction Starter Signal Circuit ECM Power Source Circuit Fuel Pump Control Circuit