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Engine Controls - Tests W/Codes Expand All (for easy ctrl-f) Collapse All Introduction Self-Diagnostic System Test Equipment Summary Circuit Tests Notes Malfunction Indicator Light (Mil) DTC P0102: MAF Sensor Low Voltage Input DTC P0103: MAF Sensor High Voltage Input DTC PO111: Intake Air Temperature (IAT) Sensor Circuit Range/Performance Problem DTC P0112: Intake Air Temperature (IAT) Sensor Low Voltage Input DTC P0113: Intake Air Temperature (IAT) Sensor High Voltage Input DTC P0116: Engine Coolant Temperature (ECT) Sensor Range/Performance Problem DTC P0117: ECT Sensor Circuit Low Voltage Input DTC P0118: ECT Sensor Circuit High Voltage Input DTC P0122: Throttle Position (TP) Sensor Low Voltage Input DTC P0123: Throttle Position (TP) Sensor High Voltage Input DTC P0130: Ho2S-1 Circuit Malfunction DTC P0133: Ho2S-1 Slow Response DTC P0135 & P0141: Front & Rear Ho2S Heater Malfunction DTC P0139: Rear Ho2S-2 Slow Response DTC P0171 & P0172: Fuel System Is Too Lean Or Too Rich DTC P0300 Or P0301, P0302, P0303, P0304 & P0305: Random Misfire DTC P0301, P0302, P0303, P0304 Or P0305: Misfire In One Cylinder DTC P0327 & P0332: Knock Sensor (KS) Low Voltage Input DTC P0328 & P0333: Knock Sensor (KS) High Voltage Input DTC P0335, P0336, P1361, P1362, P1381 & P1382: CKP/TDC/CYP Sensor DTC P0401: EGR System DTC P0420: Catalyst Efficiency Below Threshold DTC P0440: EVAP Control System Leak Detected DTC P0452: EVAP Fuel Tank Pressure Sensor Low Voltage DTC P0453: EVAP Fuel Tank Pressure Sensor High Voltage DTC P0500: Vehicle Speed Sensor (VSS) Circuit Low Voltage Input DTC P0505: Idle Control System DTC P1102: Mass Air Flow Lower Than Expected DTC P1103: Mass Air Flow Higher Than Expected DTC P1106: Barometric Pressure (BARO) Circuit Range/Performance Problem DTC P1107 & P1108: Barometric Pressure (BARO) Sensor DTC P1121: Throttle Position (TP) Lower Than Expected DTC P1122: Throttle Position (TP) Higher Than Expected DTC P1297: Electrical Load Detector (Eld) Low Voltage Detected DTC P1298: Electrical Load Detector (Eld) High Voltage Detected DTC P1336 & P1337: Crankshaft Speed Fluctuation (CKF) Sensor DTC P1359: CKP/TDC/CYP Sensor DTC P1491: Insufficient EGR Valve Lift DTC P1498: EGR Valve Lift Sensor Voltage High DTC P1508: Idle Air Control (IAC) Valve Circuit DTC P1660: A/T FI Data Line DTC P1681 & P1682: A/T FI Signal "A" Low/High Voltage DTC P1686 & P1687: A/T FI Signal "B" Low/High Voltage