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9,253 diagnostic guides

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Find codes by symptomChoose what you notice to search matching code guides.

Rough idle or shakingVibration while stopped Hard to startLong cranking or no-start Engine stallsCuts out at idle or on the road Hesitates or loses powerSlow response when accelerating Battery light is onCharging system warning Harsh gear changesDelayed or rough shifting

A symptom can have several causes. Treat matching codes as clues and follow the diagnostic checks in each guide.

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Engine1049 Emissions515 Fuel1016 Sensors & Electronics2110 Transmission866 Electrical & Charging1797 Body & Restraints193 Chassis & Brakes479 Network & Communication1228

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All severities9253 Low priority305 Check soon8256 Urgent621

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All families9253 P · Powertrain7353 B · Body193 C · Chassis479 U · Network1228

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These are generic OBD2 definitions. Exact make, model, engine, and year compatibility will appear after vehicle-fitment data is added.

Diagnostic codes

Showing 745–768 of 987

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P2CBBFan 3 UnderspeedCheck soonEngine Problems30–120 minutes for initial diagnosisP2CBB relates to fan 3 underspeed. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CC8Coolant Pump Speed Sensor CircuitCheck soonEngine Problems30–120 minutes for initial diagnosisP2CC8 relates to coolant pump speed sensor circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CC9Coolant Pump Speed Sensor Range/PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP2CC9 relates to coolant pump speed sensor range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CCACoolant Pump Speed Sensor Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP2CCA relates to coolant pump speed sensor circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CCBCoolant Pump Speed Sensor Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP2CCB relates to coolant pump speed sensor circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CDBCold Start Cylinder 1 Deactivation/Intake Valve Control PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP2CDB relates to cold start cylinder 1 deactivation/intake valve control performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CDCCold Start Cylinder 2 Deactivation/Intake Valve Control PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP2CDC relates to cold start cylinder 2 deactivation/intake valve control performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CDDCold Start Cylinder 3 Deactivation/Intake Valve Control PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP2CDD relates to cold start cylinder 3 deactivation/intake valve control performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CDECold Start Cylinder 4 Deactivation/Intake Valve Control PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP2CDE relates to cold start cylinder 4 deactivation/intake valve control performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CDFCold Start Cylinder 5 Deactivation/Intake Valve Control PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP2CDF relates to cold start cylinder 5 deactivation/intake valve control performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CE0Cold Start Cylinder 6 Deactivation/Intake Valve Control PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP2CE0 relates to cold start cylinder 6 deactivation/intake valve control performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CEFAuxiliary Thermostat A Stuck OpenCheck soonEngine Problems30–120 minutes for initial diagnosisP2CEF relates to auxiliary thermostat a stuck open. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CF0Auxiliary Thermostat A Stuck ClosedCheck soonEngine Problems30–120 minutes for initial diagnosisP2CF0 relates to auxiliary thermostat a stuck closed. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CF1Auxiliary Thermostat B Stuck OpenCheck soonEngine Problems30–120 minutes for initial diagnosisP2CF1 relates to auxiliary thermostat b stuck open. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CF2Auxiliary Thermostat B Stuck ClosedCheck soonEngine Problems30–120 minutes for initial diagnosisP2CF2 relates to auxiliary thermostat b stuck closed. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CF8Engine Coolant Bypass Valve D Control Circuit Driver Current/Temperature Too HighCheck soonEngine Problems30–120 minutes for initial diagnosisP2CF8 relates to engine coolant bypass valve d control circuit driver current/temperature too high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D00Motor Electronics Coolant Pump A Stuck/StalledCheck soonEngine Problems30–120 minutes for initial diagnosisP2D00 relates to motor electronics coolant pump a stuck/stalled. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D02Motor Electronics Coolant Pump A UnderspeedCheck soonEngine Problems30–120 minutes for initial diagnosisP2D02 relates to motor electronics coolant pump a underspeed. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D04Motor Electronics Coolant Pump A Control Module OvertemperatureCheck soonEngine Problems30–120 minutes for initial diagnosisP2D04 relates to motor electronics coolant pump a control module overtemperature. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D05Motor Electronics Coolant Pump B Stuck/StalledCheck soonEngine Problems30–120 minutes for initial diagnosisP2D05 relates to motor electronics coolant pump b stuck/stalled. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D07Motor Electronics Coolant Pump B UnderspeedCheck soonEngine Problems30–120 minutes for initial diagnosisP2D07 relates to motor electronics coolant pump b underspeed. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D09Motor Electronics Coolant Pump B Control Module OvertemperatureCheck soonEngine Problems30–120 minutes for initial diagnosisP2D09 relates to motor electronics coolant pump b control module overtemperature. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D0AMotor Electronics Coolant Pump C Stuck/StalledCheck soonEngine Problems30–120 minutes for initial diagnosisP2D0A relates to motor electronics coolant pump c stuck/stalled. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D0CMotor Electronics Coolant Pump C UnderspeedCheck soonEngine Problems30–120 minutes for initial diagnosisP2D0C relates to motor electronics coolant pump c underspeed. Check the fault conditions and vehicle-specific procedure before replacing parts.