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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.

Sensors & Electronics P · Powertrain Clear all

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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 1537–1560 of 2110

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P25F5Turbocharger/Supercharger Boost Sensor C Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP25F5 relates to turbocharger/supercharger boost sensor c circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P25F6AIR System BCheck soonSensors & Electronics30–120 minutes for initial diagnosisP25F6 relates to air system b. Check the fault conditions and vehicle-specific procedure before replacing parts.P25F7AIR System B Incorrect Flow DetectedCheck soonSensors & Electronics30–120 minutes for initial diagnosisP25F7 relates to air system b incorrect flow detected. Check the fault conditions and vehicle-specific procedure before replacing parts.P25F8Turbocharger/Supercharger Bypass Valve C Control CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP25F8 relates to turbocharger/supercharger bypass valve c control circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P25F9Turbocharger/Supercharger Bypass Valve C Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP25F9 relates to turbocharger/supercharger bypass valve c control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P25FATurbocharger/Supercharger Bypass Valve C Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP25FA relates to turbocharger/supercharger bypass valve c control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P25FBTurbocharger/Supercharger Bypass Valve C Control Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP25FB relates to turbocharger/supercharger bypass valve c control circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P25FCTurbocharger/Supercharger Bypass Valve C – MechanicalCheck soonSensors & Electronics30–120 minutes for initial diagnosisP25FC relates to turbocharger/supercharger bypass valve c – mechanical. Check the fault conditions and vehicle-specific procedure before replacing parts.P25FDTurbocharger/Supercharger Bypass Valve C Temperature Too HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP25FD relates to turbocharger/supercharger bypass valve c temperature too high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2604Intake Air Heater A Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2604 relates to intake air heater a circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2605Intake Air Heater B Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2605 relates to intake air heater b circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P2606Intake Air Heater B Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2606 relates to intake air heater b circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2607Intake Air Heater B Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2607 relates to intake air heater b circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2608Intake Air Heater B Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2608 relates to intake air heater b circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2609Intake Air Heater System PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2609 relates to intake air heater system performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P260APTO Control Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP260A relates to pto control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P260BPTO Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP260B relates to pto control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P260CPTO Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP260C relates to pto control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P260DPTO Engaged Lamp Control CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP260D relates to pto engaged lamp control circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2610ECM/PCM Engine Off Timer PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2610 relates to ecm/pcm engine off timer performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2611A/C Refrigerant Distribution Valve A Control Circuit/OpenLow prioritySensors & Electronics30–120 minutes for initial diagnosisP2611 relates to a/c refrigerant distribution valve a control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P2612A/C Refrigerant Distribution Valve A Control Circuit LowLow prioritySensors & Electronics30–120 minutes for initial diagnosisP2612 relates to a/c refrigerant distribution valve a control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2613A/C Refrigerant Distribution Valve A Control Circuit HighLow prioritySensors & Electronics30–120 minutes for initial diagnosisP2613 relates to a/c refrigerant distribution valve a control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2620Throttle Position Output Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2620 relates to throttle position output circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.