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Engine Controls - Self-Diagnostics Expand All (for easy ctrl-f) Collapse All Introduction Self-Diagnostic System Programming Drive Cycle Summary Diagnostic Trouble Code Definitions Component Locations Connector Identification System Test Diagnostic Tests Notes DTC P0030 & P0050: Ho2S Heater Circuit - Bank 1, Sensor 1 Or Bank 2, Sensor 1 DTC P0031 & P0051: Ho2S Heater Circuit - Low Voltage - Bank 1, Sensor 1 Or Bank 2, Sensor 1 DTC P0032 & P0052: Ho2S Heater Circuit - High Voltage - Bank 1, Sensor 1 Or Bank 2, Sensor 1 DTC P0036 & P0056: Ho2S Heater Circuit - Bank 1, Sensor 2 Or Bank 2, Sensor 2 DTC P0037 & P0057: Ho2S Heater Circuit - Low Voltage - Bank 1, Sensor 2 DTC P0038 & P0058: Ho2S Heater Circuit - High Voltage - Bank 1, Sensor 2 Or Bank 2, Sensor 2 DTC P0101: MAF System Performance DTC P0102: MAF Sensor Circuit - Low Signal/Frequency DTC P0103: MAF Sensor Circuit - High Signal/Frequency DTC P0107: Map Sensor Circuit - Low Voltage DTC P0108: Map Sensor Circuit - High Voltage DTC P0112: IAT Sensor Circuit - Low Voltage/High Temperature DTC P0113: IAT Sensor Circuit - High Voltage/Low Temperature DTC P0115: ECT Sensor Circuit DTC P0116: ECT Sensor Circuit Performance DTC P0117: ECT Sensor Circuit - Low Voltage/High Temperature DTC P0118: ECT Sensor Circuit - High Voltage/Low Temperature DTC P0121: TP Sensor No. 1 Circuit Performance DTC P0122: TP Sensor No. 1 Circuit - Low Voltage DTC P0123: TP Sensor No. 1 Circuit - High Voltage DTC P0125: ECT Insufficient For Close Loop Fuel Control DTC P0128: ECT Below Thermostat Regulating Temperature DTC P0130 & P0150: Ho2S Circuit - Bank 1, Sensor 1 Or Bank 2, Sensor 1 DTC P0131 & P0151: Ho2S Circuit - Low Voltage - Bank 1, Sensor 1 Or Bank 2, Sensor 1 DTC P0132 & P0152: Ho2S Circuit - High Voltage - Bank 1, Sensor 1 Or Bank 2, Sensor 1 DTC P0133 & P0153: Ho2S Slow Response Bank 1 Sensor 1 Or Bank 2, Sensor 1 DTC P0134 & P0154: Ho2S Circuit - Insufficient Activity - Bank 1, Sensor 1 Or Bank 2, Sensor 1 DTC P0135 & P0155: Ho2S Heater Circuit Performance - Bank 1, Sensor 1 Or Bank 2, Sensor 1 DTC P0136 & P0156: Ho2S Circuit - Bank 1, Sensor 2 Or Bank 2, Senor 2 DTC: P0137 & P0157: Ho2S Circuit - Low Voltage - Bank 1, Sensor 2 Or Bank 2, Sensor 2 DTC P0138 & P0158: Ho2S Circuit - High Voltage - Bank 1, Sensor 2 Or Bank 2, Sensor 2 DTC P0139 & P0159 : Ho2S Circuit - Slow Response - Bank 1, Sensor 2 Or Bank 2 Sensor 2 DTC P0140 & P0160: Ho2S Circuit - Insufficient Activity - Bank 1, Sensor 2 Or Bank 2, Sensor 2 DTC P0141 & P0161: Ho2S Heater Circuit Performance - Bank 1, Sensor 2 Or Bank 2, Sensor 2 DTC P0171 & P0174: Fuel Trim System Lean - Bank 1 Or Bank 2 DTC P0172 & P0175: Fuel Trim System Rich - Bank 1 Or Bank 2 DTC P0201-P0206: Injector No. 1-6 Control Circuit DTC P0221: TP Sensor No. 2 Circuit Performance DTC P0222: TP Sensor No. 2 Circuit - Low Voltage DTC P0223: TP Sensor No. 2 Circuit - High Voltage DTC P0261, P0264, P0267, P0270, P0273 & P0276: Injector No. 1-6 Control Circuit - Low Voltage DTC P0262, P0265, P0268, P0271, P0274 & P0277: Injector No. 1-6 Control Circuit - High Voltage DTC P0300: Engine Misfire Detected DTC P0301-P0306: Specific Cylinder Misfire Detected DTC P0313: Misfire Detected With Low Fuel DTC P0324: Knock Sensor Module Circuit DTC P0327 & P0332: Knock Sensor No. 1 Circuit Or No. 2 Circuit - Low Input DTC P0328 & P0333: Knock Sensor No. 1 Circuit Or No. 2 Circuit - High Input DTC P0335: Crankshaft Position Sensor Circuit DTC P0341: Camshaft Position Sensor Circuit Performance DTC P0342: Camshaft Position Sensor Circuit - Low Voltage DTC P0343: Camshaft Position Sensor Circuit - High Voltage DTC P0401: EGR Flow Insufficient DTC P0402: EGR Flow Excessive DTC P0403: EGR Solenoid Control Circuit DTC P0405: EGR Position Sensor Circuit - Low Voltage DTC P0406: EGR Position Sensor Circuit - High Voltage DTC P0409: Exhaust Gas RECIRCULATION Sensor "A" Circuit DTC P0421 & P0431 : Warm-Up Catalyst - Low Efficiency - Bank 1 Or Bank 2 DTC P0440: EVAP System - Flow During Non-Purge DTC P0442: EVAP System - Small Leak Detected DTC P0443: EVAP Purge Solenoid Control Circuit DTC P0444: EVAP Purge Solenoid Control Circuit - Low Voltage DTC P0445: EVAP Purge Solenoid Control Circuit- High Voltage DTC P0446: EVAP Vent System Performance DTC P0447: EVAP Vent Solenoid Control Circuit - Low Voltage DTC P0448: EVAP Vent Solenoid Control Circuit - High Voltage DTC P0449: EVAP Vent Solenoid Control Circuit DTC P0451: EVAP Fuel Tank Pressure Sensor Circuit Performance DTC P0452: EVAP Fuel Tank Pressure Sensor Circuit - Low Voltage DTC P0453: EVAP Fuel Tank Pressure Sensor Circuit - High Voltage DTC P0455: EVAP System Gross Leak Detected DTC P0489: EGR Solenoid Control Circuit - Low Voltage DTC P0490: EGR Solenoid Control Circuit - High Voltage DTC P0496: EVAP System - Flow During Non-Purge DTC P0506: Idle Speed Low DTC P0507: Idle Speed High DTC P0601-P0607, P1600, P1621, P1627, P1680, P1681 & P2610: ECM Memory DTC P0610: Control Module Vehicle Options Error DTC P0627: Fuel Pump Relay Control Circuit DTC P0628: Fuel Pump Relay Control Circuit - Low Voltage DTC P0629: Fuel Pump Relay Control Circuit - High Voltage DTC P0638: Throttle Actuator Control Command Performance DTC P0700: TCM Requested Mil Illumination DTC P1245: Intake Plenum Switchover Valve DTC P1271: App Sensors No. 1 & 2 Circuit Performance DTC P1277: App Sensor No. 1 Circuit - Low Voltage DTC P1278: App Sensor No. 1 Circuit - High Voltage DTC P1282: App Sensor No. 2 Circuit - Low Voltage DTC P1283: App Sensor No. 2 Circuit - High Voltage DTC P1403: EGR Position Circuit - Low Voltage DTC P1405: EGR Position Circuit - High Voltage DTC P1406: EGR Pintle Position Error DTC P1510: Throttle Control System - In Limitation DTC P1511: Throttle Control System - Limp Home System Performance DTC P1516: Command Vs. Actual Throttle Position Correlation Error DTC P1519: Throttle Actuator Control (TAC) Module DTC P1523: Throttle Return Performance DTC P1526: TP Sensor Learn Not Done After Reprogramming DTC P1551: Throttle Rest Position Not Reached During Learn DTC P2008: Intake Manifold Runner Control (IMRC) Solenoid Control Circuit DTC P2009: Intake Manifold Runner Control (IMRC) Solenoid Control Circuit - Low Voltage DTC P2010: Intake Manifold Runner Control (IMRC) Solenoid Control Circuit - High Voltage DTC P2100: Throttle Actuator Control (TAC) Motor Control Circuit DTC P2101: Throttle Actuator Control (TAC) Motor Position Performance DTC P2107: Throttle Actuator Control (TAC) Module Internal Circuit DTC P2119: Throttle Closed Position Performance DTC P2122: Accelerator Pedal Position Sensor 1 Circuit - Low Voltage DTC P2123: Accelerator Pedal Position Sensor 1 Circuit - High Voltage DTC P2127: Accelerator Pedal Position Sensor 2 Circuit - Low Voltage DTC P2128: Accelerator Pedal Position Sensor 2 Circuit - High Voltage DTC P2138: Accelerator Pedal Position Sensor 1-2 Correlation DTC P2176: Minimum Throttle Position Not Learned Wiring Diagrams