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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 1177–1200 of 1570

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P0EF1Drive Motor C Temperature Sensor CircuitCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0EF1 concerns drive motor c temperature sensor circuit. Learn what this fault indicates and where to begin diagnosis.P0EF2Drive Motor C Temperature Sensor Range/PerformanceCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0EF2 concerns drive motor c temperature sensor range/performance. Learn what this fault indicates and where to begin diagnosis.P0EF3Drive Motor C Temperature Sensor Circuit LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0EF3 concerns drive motor c temperature sensor circuit low. Learn what this fault indicates and where to begin diagnosis.P0EF4Drive Motor C Temperature Sensor Circuit HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0EF4 concerns drive motor c temperature sensor circuit high. Learn what this fault indicates and where to begin diagnosis.P0EF5Drive Motor C Temperature Sensor Circuit Intermittent/ErraticCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0EF5 concerns drive motor c temperature sensor circuit intermittent/erratic. Learn what this fault indicates and where to begin diagnosis.P0EF6Drive Motor C Temperature Sensor Over TemperatureCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0EF6 concerns drive motor c temperature sensor over temperature. Learn what this fault indicates and where to begin diagnosis.P0EF7Battery Charger A Input Voltage Sensor B CircuitCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0EF7 concerns battery charger a input voltage sensor b circuit. Learn what this fault indicates and where to begin diagnosis.P0EF8Battery Charger A Input Voltage Sensor B Circuit Range/PerformanceCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0EF8 concerns battery charger a input voltage sensor b circuit range/performance. Learn what this fault indicates and where to begin diagnosis.P0EF9Battery Charger A Input Voltage Sensor B Circuit LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0EF9 concerns battery charger a input voltage sensor b circuit low. Learn what this fault indicates and where to begin diagnosis.P0EFABattery Charger A Input Voltage Sensor B Circuit HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0EFA concerns battery charger a input voltage sensor b circuit high. Learn what this fault indicates and where to begin diagnosis.P0EFBBattery Charger A Input Voltage Sensor C CircuitCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0EFB concerns battery charger a input voltage sensor c circuit. Learn what this fault indicates and where to begin diagnosis.P0EFCBattery Charger A Input Voltage Sensor C Circuit Range/PerformanceCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0EFC concerns battery charger a input voltage sensor c circuit range/performance. Learn what this fault indicates and where to begin diagnosis.P0EFDBattery Charger A Input Voltage Sensor C Circuit LowCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0EFD concerns battery charger a input voltage sensor c circuit low. Learn what this fault indicates and where to begin diagnosis.P0EFEBattery Charger A Input Voltage Sensor C Circuit HighCheck soonElectrical & Charging System45–120 minutes for initial diagnosisP0EFE concerns battery charger a input voltage sensor c circuit high. Learn what this fault indicates and where to begin diagnosis.P201BIntake Manifold Runner Control Actuator Supply Voltage Low Bank 1Check soonElectrical & Charging System30–120 minutes for initial diagnosisP201B relates to intake manifold runner control actuator supply voltage low bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P201CIntake Manifold Runner Control Actuator Supply Voltage Low Bank 2Check soonElectrical & Charging System30–120 minutes for initial diagnosisP201C relates to intake manifold runner control actuator supply voltage low bank 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P20EAReductant Control Module Power Relay De-Energized Performance - Too EarlyCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP20EA relates to reductant control module power relay de-energized performance - too early. Check the fault conditions and vehicle-specific procedure before replacing parts.P20EBReductant Control Module Power Relay De-Energized Performance - Too LateCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP20EB relates to reductant control module power relay de-energized performance - too late. Check the fault conditions and vehicle-specific procedure before replacing parts.P210EThrottle/Pedal Position Sensor/Switch C/F Voltage CorrelationCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP210E relates to throttle/pedal position sensor/switch c/f voltage correlation. Check the fault conditions and vehicle-specific procedure before replacing parts.P212FThrottle/Pedal Position Sensor/Switch F/G Voltage CorrelationCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP212F relates to throttle/pedal position sensor/switch f/g voltage correlation. Check the fault conditions and vehicle-specific procedure before replacing parts.P2135Throttle/Pedal Position Sensor/Switch A/B Voltage CorrelationCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2135 relates to throttle/pedal position sensor/switch a/b voltage correlation. Check the fault conditions and vehicle-specific procedure before replacing parts.P2136Throttle/Pedal Position Sensor/Switch A/C Voltage CorrelationCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2136 relates to throttle/pedal position sensor/switch a/c voltage correlation. Check the fault conditions and vehicle-specific procedure before replacing parts.P2137Throttle/Pedal Position Sensor/Switch B/C Voltage CorrelationCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2137 relates to throttle/pedal position sensor/switch b/c voltage correlation. Check the fault conditions and vehicle-specific procedure before replacing parts.P2138Throttle/Pedal Position Sensor/Switch D/E Voltage CorrelationCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2138 relates to throttle/pedal position sensor/switch d/e voltage correlation. Check the fault conditions and vehicle-specific procedure before replacing parts.