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Engine Control System Self Diagnostics Expand All (for easy ctrl-f) Collapse All Introduction Self-Diagnostic System Programming Scan Tool Problems Summary Diagnostic Trouble Code Definitions Diagnostic Tests Notes DTC P0031, DTC P0032, DTC P0037, DTC P0038, DTC P0051, DTC P0052, DTC P0057 Or DTC P0058 DTC P0100, DTC P0102 Or DTC P0103 DTC P0101: Mass Airflow Meter Circuit Range/Performance DTC P0110, DTC P0112 Or DTC P0113 DTC P0115, DTC P0117 Or DTC P0118 DTC P0116: Engine Coolant Temperature Sensor Circuit Range/Performance Or P0125: Insufficient Coolant Temperature For Closed Loop Fuel Control DTC P0120, DTC P0122, DTC P0123, DTC P0220, DTC P0222, DTC P0223 Or DTC P2135 DTC P0121: Throttle Position Sensor Circuit Range/Performance DTC P0128: Thermostat Malfunction DTC P0130, DTC P0150, DTC P2195, DTC P2196, DTC P2197 Or DTC P2198 DTC P0133: Oxygen Sensor Circuit Slow Response (Bank 1 Sensor 1) Or P0153: Oxygen Sensor Circuit Slow Response (Bank 2 Sensor 1) DTC P0134: Heated Oxygen Sensor Circuit No Activity Detected (Bank 1 Sensor 1) Or P0154: Heated Oxygen Sensor Circuit No Activity Detected (Bank 2 Sensor 1) DTC P0136: Oxygen Sensor Circuit Malfunction (Bank 1 Sensor 2) Or P0156: Oxygen Sensor Circuit Malfunction (Bank 2 Sensor 2) DTC P0171, DTC P0172, DTC P0174 Or DTC P0175 DTC P0230: Fuel Pump Primary Circuit DTC P0300, DTC P0301, DTC P0302, DTC P0303, DTC P0304, DTC P0305, DTC P0306, DTC P0307 Or DTC P0308 DTC P0325: Knock Sensor No. 1 Circuit Or P0330: Knock Sensor No. 2 Circuit DTC P0335: Crankshaft Position Sensor "A" Circuit & P0339: Crankshaft Position Sensor "A" Circuit Intermittent DTC P0340: Camshaft Position Sensor "A" Circuit (Bank 1 Or Single Sensor) & P0341: Camshaft Position Sensor "A" Circuit Range/Performance (Single Sensor) DTC P0351, DTC P0352, DTC P0353, DTC P0354, DTC P0355, DTC P0356, DTC P0357 Or DTC P0358 DTC P0420: Catalyst System Efficiency Below Threshold (Bank 1) Or P0430: Catalyst System Efficiency Below Threshold (Bank 2) DTC P0441: EVAP Emission Control System Incorrect Purge Flow Or P0446: EVAP Emission Control System Vent Control Circuit DTC P0442: EVAP Emission Control System Leak Detected (Small Leak) & DTC P0456: EVAP Emission Control System Leak Detected (Very Small Leak) DTC P0451: EVAP Emission Control System Pressure Sensor/Switch Range/Performance, DTC P0452: EVAP Emission Control System Pressure Sensor/Switch Low Input Or DTC P0453: EVAP Emission Control System Pressure Sensor/Switch High Input DTC P0500: Vehicle Speed Sensor "A" Circuit Or DTC P0503: Vehicle Speed Sensor "A" Intermittent/Erratic/High DTC P0504: Brake Switch "A"/"B" Correlation DTC P0505: Idle Air Control System Malfunction DTC P0560: System Voltage DTC P0604: Internal Control Module Random Access Memory (Ram) Error, DTC P0606: ECM/Pcm Processor, DTC P0607: Control Module Performance Or DTC P0657: Actuator Supply Voltage Circuit/Open DTC P0617: Starter Relay Circuit High DTC P2102: Throttle Actuator Control Motor Circuit Low Or P2103: Throttle Actuator Control Motor Circuit High DTC P2111: Throttle Actuator Control System Stuck Open Or 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, DTC P2122, DTC P2123, DTC P2125, DTC P2127, DTC P2128 Or DTC P2138 DTC P2121: Accelerator Pedal Position Sensor Range/Performance