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Engine Controls - Self-Diagnostics Expand All (for easy ctrl-f) Collapse All Introduction General Description Self-Diagnostic System Component Locations Summary Diagnostic Trouble Code Definitions Systems Tests Diagnostic Tests Notes DTC P0031 & DTC P0032 DTC P0037 Or DTC P0038 DTC P0101: Mass Air Flow (MAF) Sensor Circuit Performance Problem DTC P0102: Mass Air Flow (MAF) Sensor Circuit, Low Input DTC P0103: Mass Air Flow (MAF) Sensor Circuit, High Input DTC P0107 Or P0108 DTC P0111: Intake Air Temperature (IAT) Sensor Circuit Range/Performance Problem DTC P0112: Intake Air Temperature (IAT) Sensor Circuit, Low Input DTC P0113: Intake Air Temperature (IAT) Sensor Circuit, High Input DTC P0116: Engine Coolant Temperature (ECT) Sensor Circuit Range/Performance Problem DTC P0117: Engine Coolant Temperature (ECT) Sensor Circuit, Low Input DTC P0118: Engine Coolant Temperature (ECT) Sensor Circuit, High Input DTC P0121: Throttle Position (TP) Sensor Circuit Performance Problem DTC P0122: Throttle Position (TP) Sensor Circuit, Low Input DTC P0123: Throttle Position (TP) Sensor Circuit, High Input DTC P0125: Insufficient Coolant Temperature For Closed Loop Operation DTC P0128: Coolant Thermostat Inoperative DTC P0131 Or P0132 DTC P0133: Ho2S No. 1 Circuit, Slow Response DTC P0134: Ho2S No. 1 Circuit, No Activity Detected DTC P0137: Heated Oxygen Sensor No. 2 Circuit, Low Voltage DTC P0138 Or P0140 DTC P0171 Or DTC P0172 DTC P0300, P0301, P0302, P0303 Or P0304 DTC P0327 Or P0328 DTC P0335: Crankshaft Position (CKP) Sensor Circuit Malfunction DTC P0340: Camshaft Position (CMP) Sensor Circuit Malfunction DTC P0401 Or P0402 DTC P0403: EGR Flow Malfunction DTC P0420: Catalyst System Low Efficiency DTC P0441: EVAP System - Incorrect Purge Flow DTC P0442 Or P0455 DTC P0443: EVAP Circuit, Purge Control Valve Circuit Malfunction DTC P0446: EVAP System Vent Control - Circuit Malfunction DTC P0452 Or P0453 DTC P0461: Fuel Level Sensor Circuit Performance Problem DTC P0463: Fuel Level Sensor Circuit, High Input DTC P0464: Fuel Level Sensor Circuit - Intermittent DTC P0496: EVAP System - High Purge Flow DTC P0500: Vehicle Speed Sensor (VSS) Malfunction DTC P0506 Or P0507 DTC P0601: Internal Control Module Memory Check Sum Error DTC P1500: Starter Signal Circuit Malfunction DTC P1510: Pcm Back-Up Power Supply Malfunction