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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 4993–5016 of 7353

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P25BCRegeneration Control Switch Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP25BC relates to regeneration control switch circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P25BDUnmetered Fuel - Forced Engine ShutdownCheck soonFuel System30–120 minutes for initial diagnosisP25BD relates to unmetered fuel - forced engine shutdown. Check the fault conditions and vehicle-specific procedure before replacing parts.P25BEAlternative Fuel Disable Control Circuit/OpenCheck soonFuel System30–120 minutes for initial diagnosisP25BE relates to alternative fuel disable control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P25BFAlternative Fuel Disable Control Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP25BF relates to alternative fuel disable control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P25C0Alternative Fuel Disable Control Circuit LowCheck soonFuel System30–120 minutes for initial diagnosisP25C0 relates to alternative fuel disable control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P25C1Alternative Fuel Disable Signal CircuitCheck soonFuel System30–120 minutes for initial diagnosisP25C1 relates to alternative fuel disable signal circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P25C2Alternative Fuel Disable Signal Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP25C2 relates to alternative fuel disable signal circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P25C3Alternative Fuel Disable Signal Circuit LowCheck soonFuel System30–120 minutes for initial diagnosisP25C3 relates to alternative fuel disable signal circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P25C4Brake Booster Temperature Sensor A CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP25C4 relates to brake booster temperature sensor a circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P25C5Brake Booster Temperature Sensor A Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP25C5 relates to brake booster temperature sensor a circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P25C6Brake Booster Temperature Sensor A Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP25C6 relates to brake booster temperature sensor a circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P25C7Brake Booster Temperature Sensor A Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP25C7 relates to brake booster temperature sensor a circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P25C8Brake Booster Temperature Sensor A Circuit Intermittent/ErraticCheck soonSensors & Electronics30–120 minutes for initial diagnosisP25C8 relates to brake booster temperature sensor a circuit intermittent/erratic. Check the fault conditions and vehicle-specific procedure before replacing parts.P25C9Brake System Control Module B Requested MIL IlluminationCheck soonSensors & Electronics30–120 minutes for initial diagnosisP25C9 relates to brake system control module b requested mil illumination. Check the fault conditions and vehicle-specific procedure before replacing parts.P25CAIntake Camshaft Actuator Park Lock Control Circuit/Open Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP25CA relates to intake camshaft actuator park lock control circuit/open bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P25CBIntake Camshaft Actuator Park Lock Control Circuit Low Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP25CB relates to intake camshaft actuator park lock control circuit low bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P25CCIntake Camshaft Actuator Park Lock Control Circuit High Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP25CC relates to intake camshaft actuator park lock control circuit high bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P25CDIntake Camshaft Actuator Park Lock Control Circuit/Open Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP25CD relates to intake camshaft actuator park lock control circuit/open bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P25CEIntake Camshaft Actuator Park Lock Control Circuit Low Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP25CE relates to intake camshaft actuator park lock control circuit low bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P25CFIntake Camshaft Actuator Park Lock Control Circuit High Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP25CF relates to intake camshaft actuator park lock control circuit high bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P25D0Exhaust Camshaft Actuator Park Lock Control Circuit/Open Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP25D0 relates to exhaust camshaft actuator park lock control circuit/open bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P25D1Exhaust Camshaft Actuator Park Lock Control Circuit Low Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP25D1 relates to exhaust camshaft actuator park lock control circuit low bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P25D2Exhaust Camshaft Actuator Park Lock Control Circuit High Bank 1Check soonEngine Problems30–120 minutes for initial diagnosisP25D2 relates to exhaust camshaft actuator park lock control circuit high bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P25D3Exhaust Camshaft Actuator Park Lock Control Circuit/Open Bank 2Check soonEngine Problems30–120 minutes for initial diagnosisP25D3 relates to exhaust camshaft actuator park lock control circuit/open bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.