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Engine Controls - Diagnostics Expand All (for easy ctrl-f) Collapse All How To Proceed With Troubleshooting Customer Problem Analysis Check Pre-Check Readiness Monitor Drive Pattern Diagnostic Trouble Code Chart Parts Location Terminals Of ECM Problem Symptoms Table Circuit Inspection DTC P0031: Oxygen Sensor Heater Control Circuit Low (Bank 1 Sensor 1), DTC P0032: Oxygen Sensor Heater Control Circuit High (Bank 1 Sensor 1), DTC P0037: Oxygen Sensor Heater Control Circuit Low (Bank 1 Sensor 2), DTC P0038: Oxygen Sensor Heater Control Circuit High (Bank 1 Sensor 2), DTC P0051: Oxygen Sensor Heater Control Circuit Low (Bank 2 Sensor 1), DTC P0052: Oxygen Sensor Heater Control Circuit High (Bank 2 Sensor 1), DTC P0057: Oxygen Sensor Heater Control Circuit Low (Bank 2 Sensor 2), DTC P0058: Oxygen Sensor Heater Control Circuit High (Bank 2 Sensor 2) DTC P0100: Mass Or Volume Air Flow Circuit, DTC P0102: Mass Or Volume Air Flow Circuit Low Input, DTC P0103: Mass Or Volume Air Flow Circuit High Input DTC P0101: Mass Or Volume Air Flow Circuit Range/Performance Problem DTC P0110: Intake Air Temperature Circuit, DTC P0112: Intake Air Temperature Circuit Low Input, DTC P0113: Intake Air Temperature Circuit High Input DTC P0115: Engine Coolant Temperature Circuit, DTC P0117: Engine Coolant Temperature Circuit Low Input, DTC P0118: Engine Coolant Temperature Circuit High Input DTC P0116: Engine Coolant Temperature Circuit Range/Performance Problem DTC P0120: Throttle/Pedal Position Sensor/Switch "A" Circuit, DTC P0122: Throttle/Pedal Position Sensor/Switch "A" Circuit Low Input, DTC P0123: Throttle/Pedal Position Sensor/Switch "A" Circuit High Input, DTC P0220: Throttle/Pedal Position Sensor/Switch "B" Circuit, DTC P0222: Throttle/Pedal Position Sensor/Switch "B" Circuit Low Input, DTC P0223: Throttle/Pedal Position Sensor/Switch "B" Circuit High Input, DTC P2135: Throttle/Pedal Position Sensor/Switch "A"/"B" Voltage Correction DTC P0121: Throttle/Pedal Position Sensor/Switch "A" Circuit Range/Performance Problem DTC P0125: Insufficient Coolant Temperature For Closed Loop Fuel Control DTC P0128: Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) DTC P0130: Oxygen Sensor Circuit (Bank 1 Sensor 1), DTC P0150: Oxygen Sensor Circuit (Bank 2 Sensor 1), DTC P2195: Oxygen Sensor Signal Stack Lean (Bank 1 Sensor 1), DTC P2196: Oxygen Sensor Signal Stack Rich (Bank 1 Sensor 1), DTC P2197: Oxygen Sensor Signal Stack Lean (Bank 2 Sensor 1), DTC P2198: Oxygen Sensor Signal Stack Rich (Bank 2 Sensor 1) DTC P0133: Oxygen Sensor Circuit Slow Response (Bank 1 Sensor 1), DTC P0153: Oxygen Sensor Circuit Slow Response (Bank 2 Sensor 1) DTC P0134: Oxygen Sensor Circuit No Activity Detected (Bank 1 Sensor 1), DTC P0154: Oxygen Sensor Circuit No Activity Detected (Bank 2 Sensor 1) DTC P0136: Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 2), DTC P0156: Oxygen Sensor Circuit Malfunction (Bank 2 Sensor 2) DTC P0171: System Too Lean (Bank 1), DTC P0172: System Too Rich (Bank 1), DTC P0174: System Too Lean (Bank 2), DTC P0175: System Too Rich (Bank 2) DTC P0230: Fuel Pump Primary Circuit DTC P0300: Random/Multiple Cylinder Misfire Detected, DTC P0301: Cylinder 1 Misfire Detected, DTC P0302: Cylinder 2 Misfire Detected, DTC P0303: Cylinder 3 Misfire Detected, DTC P0304: Cylinder 4 Misfire Detected, DTC P0305: Cylinder 5 Misfire Detected, DTC P0306: Cylinder 6 Misfire Detected, DTC P0307: Cylinder 7 Misfire Detected, DTC P0308: Cylinder 8 Misfire Detected DTC P0325: Knock Sensor 1 Circuit (Bank 1 or Single Sensor), DTC P0330: Knock Sensor 2 Circuit (Bank 2) DTC P0335: Crankshaft Position Sensor "A" Circuit, DTC P0339: Crankshaft Position Sensor "A" Circuit Intermittent DTC P0340: Camshaft Position Sensor "A" Circuit (Bank 1 or Single Sensor), DTC P0341: Camshaft Position Sensor "A" Circuit Range/Performance (Single Sensor) DTC P0351: Igniter Coil "A" Primary/Secondary Circuit, DTC P0352: Igniter Coil "B" Primary/Secondary Circuit, DTC P0353: Igniter Coil "C" Primary/Secondary Circuit, DTC P0354: Igniter Coil "D" Primary/Secondary Circuit, DTC P0355: Igniter Coil "E" Primary/Secondary Circuit, DTC P0356: Igniter Coil "F" Primary/Secondary Circuit, DTC P0357: Igniter Coil "G" Primary/Secondary Circuit, DTC P0358: Igniter Coil "H" Primary/Secondary Circuit DTC P0420: Catalyst System Efficiency Below Threshold (Bank 1), DTC P0430: Catalyst System Efficiency Below Threshold (Bank 2) DTC P0441: Evaporative Emission Control System Incorrect Purge Flow, DTC P0446: Evaporative Emission Control System Vent Control Circuit, DTC P2418: Evaporative Emission System Valve Control Circuit/Open DTC P0442: Evaporative Emission Control System Leak Detected (Small Leak), DTC P0455: Evaporative Emission Control System Leak Detected (Gross Leak), DTC P0456: Evaporative Emission Control System Leak Detected (Very Small Leak) DTC P0451: Evaporative Emission Control System Pressure Sensor/Switch Range/Performance, DTC P0452: Evaporative Emission Control System Pressure Sensor/Switch Low Input, DTC P0453: Evaporative Emission Control System Pressure Sensor/Switch High Input DTC P0500: Vehicle Speed Sensor "A", DTC P0503: Vehicle Speed Sensor "A" Intermittent/Erratic/High DTC P0504: Brake Switch "A"/"B" Correlation DTC P0505: Idle Air Control System DTC P0560: System Voltage DTC P0604: Internal Control Module Random Access Memory (RAM) Error, DTC P0606: ECM/PCM Processor, DTC P0607: Control Module Performance, DTC P0657: Actuator Supply Voltage Circuit / Open DTC P0617: Starter Relay Circuit High DTC P2102: Throttle Actuator Control Motor Circuit Low, DTC P2103: Throttle Actuator Control Motor Circuit High DTC P2111: Throttle Actuator Control System-Stuck Open, DTC P2112: Throttle Actuator Control System-Stuck Closed DTC P2118: Throttle Actuator Control Motor Current Range/Performance DTC P2119: Throttle Actuator Control Throttle Body Range/Performance DTC P2120: Throttle/Pedal Position Sensor/Switch "D" Circuit, DTC P2122: Throttle/Pedal Position Sensor/Switch "D" Circuit Low Input, DTC P2123: Throttle/Pedal Position Sensor/Switch "D" Circuit High Input, DTC P2125: Throttle/Pedal Position Sensor/Switch "E" Circuit, DTC P2127: Throttle/Pedal Position Sensor/Switch "E" Circuit Low Input, DTC P2128: Throttle/Pedal Position Sensor/Switch "E" Circuit High Input, DTC P2138: Throttle/Pedal Position Sensor/Switch "D"/"E" Voltage Correlation DTC P2121: Throttle/Pedal Position Sensor/Switch "D" Circuit Range/Performance ECM Power Source Circuit Fuel Pump Control Circuit Cranking Hold Function Circuit MIL Circuit