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Engine Control System Self-Diagnostics Expand All (for easy ctrl-f) Collapse All Model Identification Introduction Self-Diagnostic System Programming Inspection/Maintenance Procedures Summary Diagnostic Trouble Code Definitions System Tests Diagnostic Tests Notes DTC P0101: MAF Airflow Sensor Performance DTC P0102: MAF Sensor Circuit - Low Frequency DTC P0103: MAF Sensor Circuit - High Frequency (2.0L) DTC P0103: MAF Sensor Circuit - High Frequency (2.5L) DTC P0111: IAT Sensor Performance DTC P0112: IAT Sensor Circuit - Low Voltage DTC P0113: IAT Sensor Circuit - High Voltage DTC P0116: ECT Sensor Circuit Performance DTC P0117: ECT Sensor Circuit - Low Voltage DTC P0118: ECT Sensor Circuit - High Voltage DTC P0121: Throttle Position Sensor Performance DTC P0122: Throttle Position Sensor Circuit - Low Voltage DTC P0123: Throttle Position Sensor Circuit - High Voltage DTC P0125: ECT Excessive Time To Enter Closed Loop DTC P0131: Ho2S No. 1 Circuit - Low Voltage (2.0L) DTC P0131 Or P0151: Ho2S No. 1, Bank 1 Circuit - Low Voltage (2.5L) DTC P0132: Ho2S No. 1 Circuit - High Voltage (2.0L) DTC P0132 Or P0152: Ho2S No. 1, Bank 1 Circuit - High Voltage (2.5L) DTC P0133: Ho2S No. 1 Slow Response (2.0L) DTC P0133 Or P0153: Ho2S No. 1, Bank 1 Slow Response (2.5L) DTC P0134: Ho2S No. 1 Circuit Insufficient Activity (2.0L) DTC P0134 Or P0154: Ho2S No. 1, Bank 1 Circuit Insufficient Activity (2.5L) DTC P0135: Ho2S No. 1 Heater Circuit (2.0L) DTC P0135 Or P0155: Ho2S No. 1, Bank 1 Heater Circuit (2.5L) DTC P0136: Ho2S No. 2 Circuit (2.0L) DTC P0136 Or P0156: Ho2S No. 2, Bank 1 Circuit (2.5L) DTC P0141: Ho2S No. 2 Heater Performance (2.0L) DTC P0141: Ho2S No. 2, Bank 1 Heater Performance (2.5L) DTC P0161: Ho2S No. 2, Bank 2 Heater Performance (2.5L) DTC P0171: Lean Fuel Trim System (2.0L) DTC P0171: Lean Fuel Trim System (2.5L) DTC P0172: Rich Fuel Trim System DTC P0174: Lean Fuel Trim System - Bank 2 (2.5L) DTC P0175: Rich Fuel Trim System - Bank 2 (2.5L) DTC P0300: Engine Misfire Detected DTC P0301-P0304: Cylinder Misfire Detected (2.0L) DTC P0301-P0306: Cylinder Misfire Detected (2.5L) DTC P0327: Knock Sensor Circuit - Voltage Low (2.0L) DTC P0328: Knock Sensor Circuit - Open (2.0L) DTC P0335: Crankshaft Position Sensor Circuit DTC P0340: Camshaft Position Sensor Circuit DTC P0400: EGR Flow Malfunction (2.0L) DTC P0400: EGR Flow Malfunction (2.5L) DTC P0403: EGR Solenoid Control Circuit (2.0L) DTC P0420: Catalyst System Low Efficiency (2.0L) DTC P0420 Or P0430: Catalyst System Low Efficiency (2.5L) DTC P0440: Evaporative Emissions System With ORVR DTC P0440: Evaporative Emissions System Without ORVR (2.0L) DTC P0443: Evaporative Emission System Incorrect Purge Flow (2.0L) DTC P0450: Fuel Tank Pressure Sensor Circuit DTC P0451: Fuel Tank Pressure Sensor Performance - With ORVR DTC P0451: Fuel Tank Pressure Sensor Performance - Without ORVR (2.0L) DTC P0455: Evaporative Emission System Leak Detected - With ORVR DTC P0455: Evaporative Emission System Leak Detected - Without ORVR (2.0L) DTC P0505: Idle Control System DTC P0601: Pcm Memory (2.0L) DTC P0601-P0607, P1600, P1621, P1627 Or P1683: Pcm Memory (2.5L) DTC P0705: Transmission Range Switch DTC P1408: Map Sensor Circuit DTC P1410: EVAP Tank Pressure Control Solenoid Valve Circuit (2.0L) DTC P1450: Barometric Pressure Sensor Circuit DTC P1451: Barometric Pressure Sensor Performance DTC P1500: Start Switch Circuit DTC P1510: Pcm Backup Power Supply (2.0L) DTC P1510: Pcm Backup Power Supply (2.5L)