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Engine Controls - Self-Diagnostics Expand All (for easy ctrl-f) Collapse All Introduction Self-Diagnostic System Diagnostic Trouble Code Definitions Engine Control Module (ECM) Location Summary Intermittent Diagnostic Trouble Codes Connector Terminal Identification Diagnostic Tests Notes DTC P0102 Or P0103: Mass Airflow (MAF) Sensor DTC P0112 Or P0113: Intake Air Temperature (IAT) Sensor Circuit DTC P0116, P0117 Or P0118: Engine Coolant Temperature (ECT) Sensor Circuit DTC P0121, P0122 Or P0123: Throttle Position (TP) Sensor Circuit DTC P0130 Or P0136: Heated Oxygen Sensor (Ho2S) Circuit Malfunction DTC P0131 Or P0137: Heated Oxygen Sensor (Ho2S) Circuit Low Voltage DTC P0132 Or P0138: Heated Oxygen Sensor (Ho2S) Circuit High Voltage DTC P0133 Or P0134: Front Heated Oxygen Sensor (Ho2S) Circuit Slow Response Or No Activity Detected DTC P0135 Or P0141: Heated Oxygen Sensor (Ho2S) Heater Circuit Malfunction DTCs P0201, P0202, P0203 & P0204: CYLINDERS NO. 1-4 FUEL INJECTOR CIRCUIT MALFUNCTION DTC P0300: Random Misfire Detected DTCs P0301, P0302, P0303 & P0304: CYLINDERS NO. 1-4 MISFIRE DETECTED DTC P0326: Knock Sensor Circuit Range DTC P0335 Or P0336: Crankshaft Position (CKP) Sensor DTC P0342 Or P0343: Camshaft Position (CMP) Sensor Circuit DTC P0422: Catalytic Converter Efficiency Below Threshold DTC P0441, P0442, P0443 Or P0455: EVAP System Flow Problem DTC P0444 Or P0445: Canister Purge Control Valve Circuit DTC P0446, P0447 Or P0448: EVAP System Vent Control Malfunction DTC P0451, P0452 Or P0453: Fuel Tank Pressure (Ftp) Sensor Circuit DTC P0501: Vehicle Speed Sensor (VSS) Circuit Malfunction DTC P0506 Or P0507: Idle Rpm Is Not As Expected DTC P1123, P1124, P1127 Or P1128: Air/Fuel Ratio Control DTC P1510 Or P1552: Idle Speed Control (ISC) Actuator Circuit Shorted DTC P1513 Or P1553: Idle Speed Control (ISC) Actuator Circuit Open DTC P1605 Or P1606: Rough Road Sensor Circuit DTC P1611 Or P1613: Malfunction Indicator Light (Mil) Request Signal Circuit