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Engine Controls - Self-Diagnostics Expand All (for easy ctrl-f) Collapse All Introduction Component Locations Self-Diagnostic System Fuel System Pressure Release Programming Summary Diagnostic Trouble Code Definitions Connector Identification Diagnostic Tests Notes DTC P0030: 1/1 O2 Sensor Heater Circuit, DTC P0036: 1/2 O2 Sensor Heater Circuit, DTC P0050: 2/1 O2 Sensor Heater Or DTC P0056: 2/2 O2 Sensor Heater Circuit DTC P0068: Manifold Pressure/Throttle Position Correlation - High Flow/Vacuum Leak Detected DTC P0070: Ambient Temp Sensor Stuck Or DTC P0071: Ambient Temp Sensor Performance DTC P0072: Ambient Temp Sensor Low DTC P0073: Ambient Temp Sensor High DTC P0106: Map Sensor Performance DTC P0107: Map Sensor Low DTC P0108: Map Sensor High DTC P0110: Intake Air Temperature Sensor Stuck Or DTC P0111: Intake Air Temperature Sensor Performance DTC P0112: Intake Air Temperature Sensor Low DTC P0113: Intake Air Temperature Sensor High DTC P0116: Engine Coolant Temperature Performance DTC P0117: Engine Coolant Temperature Sensor Low DTC P0118: Engine Coolant Temperature Sensor High DTC P0121: Throttle Position Sensor #1 Performance DTC P0122: Throttle Position Sensor #1 Low DTC P0123: Throttle Position Sensor #1 High DTC P0125: Insufficient Coolant Temp For Closed-Loop Fuel Control DTC P0128: Thermostat Rationality DTC P0129: Barometric Pressure Out-Of-Range Low DTC P0131: O2 Sensor 1/1 Voltage Low, DTC P0137: O2 Sensor 1/2 Voltage Low, DTC P0151: O2 Sensor 2/1 Voltage Low Or DTC P0157: O2 Sensor 2/2 Voltage Low DTC P0132: O2 Sensor 1/1 Voltage High, DTC P0138: O2 Sensor 1/2 Voltage High, DTC P0152: O2 Sensor 2/1 Voltage High Or DTC P0158: O2 Sensor 2/2 Voltage High DTC P0133: O2 Sensor 1/1 Slow Response, DTC P0139: O2 Sensor 1/2 Slow Response, DTC P0153: O2 Sensor 2/1 Slow Response Or DTC P0159: O2 Sensor 2/2 Slow Response DTC P0135: O2 Sensor 1/1 Heater Performance, DTC P0141: O2 Sensor 1/2 Heater Performance, DTC P0155: O2 Sensor 2/1 Heater Performance Or DTC P0161: O2 Sensor 2/2 Heater Performance DTC P0171: Fuel System 1/1 Lean Or DTC P0174: Fuel System 2/1 Lean DTC P0172: Fuel System 1/1 Rich Or DTC P0175: Fuel System 2/1 Rich DTC P0201: Fuel Injector #1, DTC P0202: Fuel Injector #2, DTC P0203: Fuel Injector #3, DTC P0204: Fuel Injector #4, DTC P0205: Fuel Injector #5 Or DTC P0206: Fuel Injector #6 DTC P0300: Multiple Cylinder Misfire, DTC P0301: Cylinder #1 Misfire, DTC P0302: Cylinder #2 Misfire, DTC P0303: Cylinder #3 Misfire, DTC P0304: Cylinder #4 Misfire, DTC P0305: Cylinder #5 Misfire Or DTC P0306: Cylinder #6 Misfire DTC P0315: No Crank Sensor Learned DTC P0325: Knock Sensor #1 Circuit DTC P0335: Crankshaft Position Sensor Circuit DTC P0339: Crankshaft Position Sensor Intermittent DTC P0340: Camshaft Position Sensor Circuit DTC P0344: Camshaft Position Sensor Intermittent DTC P0351: Ignition Coil #1 Circuit, DTC P0352: Ignition Coil #2 Circuit, DTC P0353: Ignition Coil #3 Circuit, DTC P0354: Ignition Coil #4 Circuit, DTC P0355: Ignition Coil #5 Circuit Or DTC P0356: Ignition Coil #6 Circuit DTC P0401: EGR System Performance DTC P0403: EGR Control Circuit DTC P0404: EGR Position Sensor Performance DTC P0405: EGR Position Sensor Low DTC P0406: EGR Position Sensor High DTC P0420: Catalytic 1/1 Efficiency Or DTC P0432: Catalytic 2/1 Efficiency DTC P0440: General EVAP System Failure DTC P0441: EVAP Purge System Performance DTC P0442: EVAP System Medium Leak Or DTC P0455: EVAP System Large Leak DTC P0443: EVAP Purge Solenoid Circuit DTC P0452: NVLD Pressure Switch Sense Circuit Low DTC P0453: NVLD Pressure Switch Sense Circuit High DTC P0456: EVAP System Small Leak DTC P0461: Fuel Level Sensor #1 Performance DTC P0462: Fuel Level Sensor #1 Low Or DTC P0463: Fuel Level Sensor #1 High DTC P0480: Low Speed Fan Control Relay Circuit DTC P0481: High Speed Fan Control Relay Circuit DTC P0498: NVLD Canister Vent Valve Solenoid Circuit Low DTC P0499: NVLD Canister Vent Valve Solenoid Circuit High DTC P0501: Vehicle Speed Sensor #1 Performance DTC P0508: IAC Valve Sense Circuit Low DTC P0509: IAC Valve Sense Circuit High DTC P0513: Invalid Skim Key DTC P0519: Idle Speed Performance DTC P0532: A/C Pressure Sensor Low DTC P0533: A/C Pressure Sensor High DTC P0562: Battery Voltage Low DTC P0563: Battery Voltage High DTC P0579: Speed Control Switch #1 Performance DTC P0580: Speed Control Switch #1 Low DTC P0581: Speed Control Switch #1 High DTC P0582: Speed Control Vacuum Solenoid Circuit DTC P0586: Speed Control Vent Solenoid Circuit DTC P0594: Speed Control Servo Power Circuit DTC P0600: Serial Communication Link Or DTC P0601: Internal Memory Checksum Invalid DTC P0622: Generator Field Control Circuit DTC P0627: Fuel Pump Relay Circuit DTC P0630: VIN Not Programmed In Pcm DTC P0632: Odometer Not Programmed In Pcm DTC P0633: Skim Key Not Programmed In Pcm DTC P0645: A/C Clutch Relay Circuit DTC P0660: Manifold Tune Valve Solenoid Circuit DTC P0685: ASD Relay Control Circuit DTC P0688: ASD Relay Sense Circuit Low DTC P0700: Transmission Control System/Read Transmission DTCS On The DRBIII® DTC P0703: Brake Switch #2 Circuit DTC P0850: Park/Neutral Switch Performance DTC P1602: Pcm Not Programmed DTC P1603: Pcm Internal Dual-Port Ram Communication, DTC P1604: Pcm Internal Dual-Port Ram Read/Write Integrity Failure Or DTC P1607: Pcm Internal Shutdown Timer Rationality DTC P1686: No Skim Bus Messages DTC P1687: No Cluster Bus Message DTC P1695: No Body Bus Messages DTC P1696: EEPROM Memory Write Denied/Invalid Or DTC P1697: EMR (Sri) Mileage Not Stored DTC P1698: No Transmission Bus Message DTC P2008: Short Runner Solenoid Circuit DTC P2302: Ignition Coil #1 Secondary Circuit-Insufficient Ionization, DTC P2305: Ignition Coil #2 Circuit-Insufficient Ionization, DTC P2308: Ignition Coil #3 Circuit-Insufficient Ionization, DTC P2311: Ignition Coil #4 Circuit-Insufficient Ionization, DTC P2314: Ignition Coil #5 Circuit-Insufficient Ionization Or DTC P2317: Ignition Coil #6 Circuit-Insufficient Ionization DTC P2503: Charging System Voltage Low Verification Tests