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Engine Controls - Self-Diagnostics Expand All (for easy ctrl-f) Collapse All Description & Operation Self-Diagnostic System Summary Connector Identification Diagnostic Trouble Code Identification Diagnostic Tests DTC P0101: Mass Airflow Sensor Performance DTC P0102, P0103 & P1104: Mass Airflow Sensor Circuit DTC P0111 & P0112: Intake Air Temperature Sensor DTC P0113: Intake Air Temperature Sensor DTC P0116: Engine Coolant Temperature Sensor Performance & DTC P0125: Insufficient Coolant Temperature For Closed Loop Fuel Control DTC P0117: Engine Coolant Temperature Sensor Circuit Low Input (XJ Series) DTC P0117: Engine Coolant Temperature Sensor Circuit Low Input (XK8) DTC P0118: Engine Coolant Temperature Sensor Circuit High Input (XJ Series) DTC P0118: Engine Coolant Temperature Sensor Circuit High Input (XK8) DTC P0121: Throttle Position Sensor "A" Performance DTC P0122: Throttle Position Sensor "A" Voltage Low Or DTC P0222: Throttle Position Sensor "B" Voltage Low DTC P0123: Throttle Position Sensor "A" Voltage High Or DTC P0223: Throttle Position Sensor "B" Voltage High DTC P0125: Insufficient Coolant Temperature For Closed Loop Fuel Control DTC P0131, P0132 & P0135: Ho2S Circuit Low/High Voltage Or Heater Circuit Malfunction (Bank No. 1, Sensor No. 1) DTC P0133: Ho2S Sensor Circuit Slow Response (Bank No. 1, Sensor No. 1) DTC P0135: Ho2S Heater Circuit Malfunction (Bank No. 1, Sensor No. 1) DTC P0137 & P0138: Oxygen Sensor Low/High Voltage (Bank No. 1, Sensor No. 2) DTC P0140: Oxygen Sensor No Signal Or Poor Signal Detected (Bank No. 1, Sensor No. 2) DTC P0151, P0152 & P0155: Ho2S Sensor Circuit Low/High Voltage Or Heater Circuit Malfunction (Bank No. 2, Sensor No. 1) DTC P0153: Ho2S Sensor Circuit Slow Response (Bank No. 2, Sensor No. 1) DTC P0155: Ho2S Sensor Heater Circuit Malfunction (Bank No. 2, Sensor No. 1) DTC P0157 & P0158: Oxygen Sensor Circuit Low/High Voltage (Bank No. 2, Sensor No. 2) DTC P0160: Oxygen Sensor No Signal Or Poor Signal Detected (Bank No. 2, Sensor No. 2) DTC P0171, P0172, P0174 Or P0175: System Too Lean/Rich DTC P0201-P0208: Injector Circuit DTC P0222: Throttle Position Sensor "B" Voltage Low DTC P0223: Throttle Position Sensor "B" Voltage High DTC P0300-P0308, P1313, P1314 & P1316: Misfire DTC P0327, P0328, P0332 & P0333: Knock Sensor DTC P0335: Crankshaft Position Sensor Circuit DTC P0340: Camshaft Position Sensor Circuit Or P1336: Crankshaft Or Camshaft Position Sensor Performance DTC P0351-P0358: Ignition Coil Circuit Malfunction DTC P0400: EGR Flow Malfunction (XJR) DTC P0405: EGR Sensor Circuit Low (XJR) DTC P0406: EGR Sensor Circuit High (XJR) DTC P0420 & P0430: Catalyst Efficiency Below Threshold DTC P0441: EVAP Control System (XK8) DTC P0442: EVAP Control System Leak Detected (XJ Series) DTC P0444 & P0445: EVAP Control System Purge Valve (XJ Series) DTC P0444 & P0445: EVAP Control System Purge Valve (XK8) DTC P0447 & P0448: EVAP Control System Canister Close Valve Circuit (XJ Series) DTC P0452 & P0453: Fuel Tank Pressure Sensor DTC P0460: Fuel Level Sensor DTC P0506 & P0507: Idle Speed Control System DTC P0560: System Voltage Malfunction DTC P0603: Internal ECM Error DTC P1104: Mass Airflow Sensor DTC P1112: Intake Air Temperature Sensor No. 2 High Voltage (XJR) DTC P1113: Intake Air Temperature Sensor No. 2 Low Voltage (XJR) DTC P1224: Electronic Throttle Control Position Error DTC P1226: Mechanical Guard Circuit Range DTC P1227 & P1228: Mechanical Guard Circuit Low Or High Input DTC P1229: Throttle Control Circuit Malfunction DTC P1230: Fuel Pump Relay Malfunction DTC P1240: Sensor Power Supply Malfunction DTC P1241-P1242: Sensor Power Supply Low Or High Input DTC P1243: Analog Ground Malfunction DTC P1245-P1246: Crank Signal Low Or High Input DTC P1313, P1314 & P1316: Misfire, Catalyst Damage/Excess Emissions DTC P1336: Camshaft Position Sensor (CMP) Circuit DTC P1367: Ignition System Failure Group 1 DTC P1368: Ignition System Failure Group 2 DTC P1392 & P1397: Variable Valve Timing Solenoid Low Input DTC P1393 & P1398: Variable Valve Timing Solenoid High Input DTC P1396 Variable Valve Timing (VVT) Solenoid "B" Malfunction DTC P1397: Variable Valve Timing Solenoid "B" Low Input DTC P1398: Variable Valve Timing Solenoid "B" High Input DTC P1474: INTERCOOLER Coolant Pump Relay Malfunction DTC P1516: Park/Neutral Malfunction DTC P1609: Internal ECM Error DTC P1611: Throttle Target Malfunction DTC P1612: Throttle Offset Malfunction DTC P1646: Secondary Fuel Pump Relay Malfunction (XJR)