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Engine Controls - Self-Diagnostics Expand All (for easy ctrl-f) Collapse All Model Identification Introduction Self-Diagnostic System Programming Drive Cycles Summary Diagnostic Trouble Code Definitions Component Locations Connector Identification System Tests Diagnostic Tests Notes DTC P0031 Or P0037: Ho2S Heater Circuit Low Voltage - Bank 1; Sensor 1 Or 2 DTC P0032 Or P0038: Ho2S Heater Circuit High Voltage - Bank 1; Sensor 1 Or 2 DTC P0106: Manifold Absolute Pressure System Performance DTC P0107: Manifold Absolute Pressure Sensor Circuit - Low Voltage DTC P0108: Manifold Absolute Pressure Sensor Circuit - High Voltage DTC P0112: Intake Air Temperature Sensor Circuit - Low Voltage DTC P0113: Intake Air Temperature Sensor Circuit - High Voltage DTC P0116: Engine Coolant Temperature Sensor Circuit Performance DTC P0117: Engine Coolant Temperature Sensor Circuit - Low Voltage DTC P0118: Engine Coolant Temperature Sensor Circuit - High Voltage DTC P0122: Throttle Position Sensor Circuit - Low Voltage DTC P0123: Throttle Position Sensor Circuit - High Voltage DTC P0125: Engine Coolant Temperature Excessive Time To Closed Loop Fuel Control DTC P0128: Engine Coolant Temperature Below Thermostat Regulating Temperature DTC P0130: Ho2S Circuit Closed Loop Performance - Sensor 1 DTC P0131: Ho2S Circuit Low Voltage - Sensor 1 DTC P0132: Ho2S Circuit High Voltage - Sensor 1 DTC P0133: Ho2S Slow Response - Sensor 1 DTC P0134: Ho2S Circuit Insufficient Activity - Sensor 1 DTC P0135 Or P0141: Ho2S Heater Circuit - Bank 1; Sensor 1 Or 3 DTC P0137: Ho2S Circuit Low Voltage - Bank 1; Sensor 2 DTC P0138: Ho2S Circuit High Voltage - Bank 1; Sensor 2 DTC P0140: Ho2S Circuit Insufficient Activity - Bank 1; Sensor 2 DTC P0171: Fuel Trim System Lean DTC P0172: Fuel Trim System Rich DTC P0200: Injector Control Circuit Voltage DTC P0261, P0264, P0267 Or P0270: Injector Control Circuit - Low DTC P0262, P0265, P0268 Or P0271: Injector Control Circuit - High DTC P0300: Engine Misfire Detected DTC P0315: Crankshaft Position System Variation Not Learned DTC P0324: Knock Control System Error DTC P0326: Knock Sensor Performance DTC P0327: Knock Sensor Circuit DTC P0336: Crankshaft Position Sensor Performance DTC P0340: Camshaft Position Sensor Circuit - Low Input DTC P0341: Camshaft Position Sensor Performance DTC P0351: Ignition Coil "A" Primary/Secondary Circuit DTC P0352: Ignition Coil "B" Primary/Secondary Circuit DTC P0420: Catalyst System Efficiency Below Threshold - Bank 1 DTC P0442: Evaporative Emission Control System - Small Leak Detected DTC P0444: Evaporative Emission Control System Purge Control Valve Circuit Open DTC P0445: Evaporative Emission Control System Purge Control Valve Circuit Shorted DTC P0446: Evaporative Emission Control System Vent Control Circuit DTC P0447: EVAP Vent Valve Control Circuit Open DTC P0448: EVAP Vent Valve Control Circuit Shorted DTC P0452: Fuel Tank Pressure Sensor Circuit - Low Voltage DTC P0453: Fuel Tank Pressure Sensor Circuit - High Voltage DTC P0455: Evaporative Emission Control System Leak Detected (Gross Leak/No Flow) DTC P0496: Evaporative Emission Control System Leak Detected (Very Small Leak) DTC P0506: Idle Speed Low DTC P0507: Idle Control System Rpm Higher Than Expected DTC P0508: Idle Control System Circuit - Low DTC P0509: Idle Control System Circuit - High DTC P0601-P0607, P1600, P1621, P1627, P1680, P1681, P1683 Or P2610: ECM Malfunction DTC P0628: Fuel Pump "A" Control Circuit - Low DTC P0629: Fuel Pump "A" Control Circuit - High DTC P0630: VIN Not Programmed Or Incompatible - ECM DTC P0641: ECM Detects A Voltage Out-Of-Tolerance Condition On The 5-Volt Reference Circuit DTC P0650: Mil Control Circuit DTC P0700: Transmission Control System (Mil Request) DTC P1133: Ho2S Insufficient Switching - Sensor 1 DTC P1134: Ho2S Transition Time Ratio - Sensor 1 DTC P1351: Ic Circuit Open DTC P1352: Ignition Bypass Circuit Open/High Voltage DTC P1599: Engine Stall Or Near Stall Detected DTC P1624: ECM Ram Performance DTC P1700: Transmission Control Module Requested Mil Illumination Wiring Diagrams