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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.

Check soon 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 4369–4392 of 6682

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P254EPTO Speed Selector Sensor/Switch 1 Circuit Intermittent/ErraticCheck soonSensors & Electronics30–120 minutes for initial diagnosisP254E relates to pto speed selector sensor/switch 1 circuit intermittent/erratic. Check the fault conditions and vehicle-specific procedure before replacing parts.P254FEngine Hood Switch CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP254F relates to engine hood switch circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2550Torque Management Request Input Signal B LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2550 relates to torque management request input signal b low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2551Torque Management Request Input Signal B HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2551 relates to torque management request input signal b high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2552Throttle/Fuel Inhibit A CircuitCheck soonFuel System30–120 minutes for initial diagnosisP2552 relates to throttle/fuel inhibit a circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2553Throttle/Fuel Inhibit A Circuit Range/PerformanceCheck soonFuel System30–120 minutes for initial diagnosisP2553 relates to throttle/fuel inhibit a circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2554Throttle/Fuel Inhibit A Circuit LowCheck soonFuel System30–120 minutes for initial diagnosisP2554 relates to throttle/fuel inhibit a circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2555Throttle/Fuel Inhibit A Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP2555 relates to throttle/fuel inhibit a circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2556Engine Coolant Level Sensor/Switch CircuitCheck soonEngine Problems30–120 minutes for initial diagnosisP2556 relates to engine coolant level sensor/switch circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2557Engine Coolant Level Sensor/Switch Circuit Range/PerformanceCheck soonEngine Problems30–120 minutes for initial diagnosisP2557 relates to engine coolant level sensor/switch circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2558Engine Coolant Level Sensor/Switch Circuit LowCheck soonEngine Problems30–120 minutes for initial diagnosisP2558 relates to engine coolant level sensor/switch circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2559Engine Coolant Level Sensor/Switch Circuit HighCheck soonEngine Problems30–120 minutes for initial diagnosisP2559 relates to engine coolant level sensor/switch circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P255APTO Speed Selector Sensor/Switch 2 Circuit/OpenCheck soonSensors & Electronics30–120 minutes for initial diagnosisP255A relates to pto speed selector sensor/switch 2 circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P255BPTO Speed Selector Sensor/Switch 2 Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP255B relates to pto speed selector sensor/switch 2 range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P255CPTO Speed Selector Sensor/Switch 2 Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP255C relates to pto speed selector sensor/switch 2 circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P255DPTO Speed Selector Sensor/Switch 2 Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP255D relates to pto speed selector sensor/switch 2 circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P255EPTO Speed Selector Sensor/Switch 2 Circuit Intermittent/ErraticCheck soonSensors & Electronics30–120 minutes for initial diagnosisP255E relates to pto speed selector sensor/switch 2 circuit intermittent/erratic. Check the fault conditions and vehicle-specific procedure before replacing parts.P2560Engine Coolant Level LowCheck soonEngine Problems30–120 minutes for initial diagnosisP2560 relates to engine coolant level low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2562Turbocharger Boost Control Position Sensor A CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2562 relates to turbocharger boost control position sensor a circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2563Turbocharger Boost Control Position Sensor A Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2563 relates to turbocharger boost control position sensor a circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2564Turbocharger Boost Control Position Sensor A Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2564 relates to turbocharger boost control position sensor a circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2565Turbocharger Boost Control Position Sensor A Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2565 relates to turbocharger boost control position sensor a circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2566Turbocharger Boost Control Position Sensor A Circuit IntermittentCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2566 relates to turbocharger boost control position sensor a circuit intermittent. Check the fault conditions and vehicle-specific procedure before replacing parts.P2567Direct Ozone Reduction Catalyst Temperature Sensor CircuitCheck soonEmissions System30–120 minutes for initial diagnosisP2567 relates to direct ozone reduction catalyst temperature sensor circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.