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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 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 601–624 of 1016

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P233CFuel Pressure Regulator C Control Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP233C relates to fuel pressure regulator c control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P233DFuel Pressure Regulator B Solenoid Supply Voltage Control Circuit/OpenCheck soonFuel System30–120 minutes for initial diagnosisP233D relates to fuel pressure regulator b solenoid supply voltage control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P233EFuel Pressure Regulator B Solenoid Supply Voltage Control Circuit LowCheck soonFuel System30–120 minutes for initial diagnosisP233E relates to fuel pressure regulator b solenoid supply voltage control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P233FFuel Pressure Regulator B Solenoid Supply Voltage Control Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP233F relates to fuel pressure regulator b solenoid supply voltage control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2370Fuel Volume Regulator B Control Circuit/OpenCheck soonFuel System30–120 minutes for initial diagnosisP2370 relates to fuel volume regulator b control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P2371Fuel Volume Regulator B Control Circuit PerformanceCheck soonFuel System30–120 minutes for initial diagnosisP2371 relates to fuel volume regulator b control circuit performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2372Fuel Volume Regulator B Control Circuit LowCheck soonFuel System30–120 minutes for initial diagnosisP2372 relates to fuel volume regulator b control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2373Fuel Volume Regulator B Control Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP2373 relates to fuel volume regulator b control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P238AWater in Fuel Sensor B CircuitCheck soonFuel System30–120 minutes for initial diagnosisP238A relates to water in fuel sensor b circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P238BWater in Fuel Sensor B Circuit Range/PerformanceCheck soonFuel System30–120 minutes for initial diagnosisP238B relates to water in fuel sensor b circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P238CWater in Fuel Sensor B Circuit LowCheck soonFuel System30–120 minutes for initial diagnosisP238C relates to water in fuel sensor b circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P238DWater in Fuel Sensor B Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP238D relates to water in fuel sensor b circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P238EWater in Fuel Sensor B Circuit IntermittentCheck soonFuel System30–120 minutes for initial diagnosisP238E relates to water in fuel sensor b circuit intermittent. Check the fault conditions and vehicle-specific procedure before replacing parts.P238FWater in Fuel Condition - Sensor BCheck soonFuel System30–120 minutes for initial diagnosisP238F relates to water in fuel condition - sensor b. Check the fault conditions and vehicle-specific procedure before replacing parts.P23C7Fuel Heater Control Module Power Control Circuit/OpenCheck soonFuel System30–120 minutes for initial diagnosisP23C7 relates to fuel heater control module power control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P23C8Fuel Heater Control Module Power Control Circuit LowCheck soonFuel System30–120 minutes for initial diagnosisP23C8 relates to fuel heater control module power control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P23C9Fuel Heater Control Module Power Control Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP23C9 relates to fuel heater control module power control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P23CAFuel Rail Heater Control Circuit/OpenCheck soonFuel System30–120 minutes for initial diagnosisP23CA relates to fuel rail heater control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P23CBFuel Rail Heater Control Circuit LowCheck soonFuel System30–120 minutes for initial diagnosisP23CB relates to fuel rail heater control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P23CCFuel Rail Heater Control Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP23CC relates to fuel rail heater control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P23CDFuel Heater Control Module Feedback Signal/OpenCheck soonFuel System30–120 minutes for initial diagnosisP23CD relates to fuel heater control module feedback signal/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P23CEFuel Heater Control Module Feedback Signal PerformanceCheck soonFuel System30–120 minutes for initial diagnosisP23CE relates to fuel heater control module feedback signal performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P23CFFuel Heater Control Module Feedback Signal Circuit LowCheck soonFuel System30–120 minutes for initial diagnosisP23CF relates to fuel heater control module feedback signal circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P23D0Fuel Heater Control Module Feedback Signal Circuit HighCheck soonFuel System30–120 minutes for initial diagnosisP23D0 relates to fuel heater control module feedback signal circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.