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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.

Fuel System Check soon Clear all

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

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Severity

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 649–672 of 975

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P25A7Fuel Mode Select Switch Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP25A7 relates to fuel mode select switch circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P25A8Fuel Mode Select Switch Circuit Intermittent/ErraticCheck soonFuel System30–120 minutes for initial diagnosisP25A8 relates to fuel mode select switch circuit intermittent/erratic. 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.P2623Injector Control Pressure Regulator Circuit/OpenCheck soonFuel System30–120 minutes for initial diagnosisP2623 relates to injector control pressure regulator circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P2624Injector Control Pressure Regulator Circuit LowCheck soonFuel System30–120 minutes for initial diagnosisP2624 relates to injector control pressure regulator circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2625Injector Control Pressure Regulator Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP2625 relates to injector control pressure regulator circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P262AFuel Injector - Pilot Injection Not LearnedCheck soonFuel System30–120 minutes for initial diagnosisP262A relates to fuel injector - pilot injection not learned. Check the fault conditions and vehicle-specific procedure before replacing parts.P2632Fuel Pump B Control Circuit /OpenCheck soonFuel System30–120 minutes for initial diagnosisP2632 relates to fuel pump b control circuit /open. Check the fault conditions and vehicle-specific procedure before replacing parts.P2633Fuel Pump B Control Circuit LowCheck soonFuel System30–120 minutes for initial diagnosisP2633 relates to fuel pump b control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2634Fuel Pump B Control Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP2634 relates to fuel pump b control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2635Fuel Pump A Low Flow/PerformanceCheck soonFuel System30–120 minutes for initial diagnosisP2635 relates to fuel pump a low flow/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2636Fuel Pump B Low Flow/PerformanceCheck soonFuel System30–120 minutes for initial diagnosisP2636 relates to fuel pump b low flow/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2665Fuel Shutoff Valve B Control Circuit/OpenCheck soonFuel System30–120 minutes for initial diagnosisP2665 relates to fuel shutoff valve b control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P2666Fuel Shutoff Valve B Control Circuit LowCheck soonFuel System30–120 minutes for initial diagnosisP2666 relates to fuel shutoff valve b control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2667Fuel Shutoff Valve B Control Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP2667 relates to fuel shutoff valve b control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2668Fuel Mode Indicator Lamp Control CircuitCheck soonFuel System30–120 minutes for initial diagnosisP2668 relates to fuel mode indicator lamp control circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2672Injection Pump Timing OffsetCheck soonFuel System30–120 minutes for initial diagnosisP2672 relates to injection pump timing offset. Check the fault conditions and vehicle-specific procedure before replacing parts.P2673Injection Pump Timing Calibration Not LearnedCheck soonFuel System30–120 minutes for initial diagnosisP2673 relates to injection pump timing calibration not learned. Check the fault conditions and vehicle-specific procedure before replacing parts.