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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 Clear all

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

FiltersSeverity · family

Severity

All severities9253 Low priority305 Check soon8256 Urgent621

Code family

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 985–1008 of 1016

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P2EAFReductant Injection Valve Stuck Closed Bank 1 Unit 2Check soonFuel System30–120 minutes for initial diagnosisP2EAF relates to reductant injection valve stuck closed bank 1 unit 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P2EB9Reductant Injection Valve Circuit Range/Performance Bank 2 Unit 2Check soonFuel System30–120 minutes for initial diagnosisP2EB9 relates to reductant injection valve circuit range/performance bank 2 unit 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P0001Fuel Volume Regulator Control Circuit/OpenCheck soonFuel System45–120 minutes for initial diagnosisP0001 means Fuel Volume Regulator Control Circuit/Open. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0002Fuel Volume Regulator Control Circuit Range/PerformanceCheck soonFuel System45–120 minutes for initial diagnosisP0002 means Fuel Volume Regulator Control Circuit Range/Performance. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0003Fuel Volume Regulator Control Circuit LowCheck soonFuel System45–120 minutes for initial diagnosisP0003 means Fuel Volume Regulator Control Circuit Low. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0004Fuel Volume Regulator Control Circuit HighCheck soonFuel System45–120 minutes for initial diagnosisP0004 means Fuel Volume Regulator Control Circuit High. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0065Air Assisted Injector Control Range/PerformanceCheck soonFuel System45–120 minutes for initial diagnosisP0065 means Air Assisted Injector Control Range/Performance. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0066Air Assisted Injector Control Circuit or Circuit LowCheck soonFuel System45–120 minutes for initial diagnosisP0066 means Air Assisted Injector Control Circuit or Circuit Low. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0067Air Assisted Injector Control Circuit HighCheck soonFuel System45–120 minutes for initial diagnosisP0067 means Air Assisted Injector Control Circuit High. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0091Fuel Pressure Regulator 1 Control Circuit LowCheck soonFuel System45–120 minutes for initial diagnosisP0091 means Fuel Pressure Regulator 1 Control Circuit Low. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0092Fuel Pressure Regulator 1 Control Circuit HighCheck soonFuel System45–120 minutes for initial diagnosisP0092 means Fuel Pressure Regulator 1 Control Circuit High. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0094Fuel System Leak Detected — Small LeakCheck soonFuel System45–120 minutes for initial diagnosisP0094 means Fuel System Leak Detected — Small Leak. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0191Fuel Rail Pressure Sensor A Circuit Range/PerformanceCheck soonFuel System45–120 minutes for initial diagnosisP0191 means Fuel Rail Pressure Sensor A Circuit Range/Performance. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0192Fuel Rail Pressure Sensor A Circuit LowCheck soonFuel System45–120 minutes for initial diagnosisP0192 means Fuel Rail Pressure Sensor A Circuit Low. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0193Fuel Rail Pressure Sensor A Circuit HighCheck soonFuel System45–120 minutes for initial diagnosisP0193 means Fuel Rail Pressure Sensor A Circuit High. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0194Fuel Rail Pressure Sensor A Circuit IntermittentCheck soonFuel System45–120 minutes for initial diagnosisP0194 means Fuel Rail Pressure Sensor A Circuit Intermittent. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0202Injector Circuit/Open Cylinder 2Check soonFuel System45–120 minutes for initial diagnosisP0202 means Injector Circuit/Open Cylinder 2. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0203Injector Circuit/Open Cylinder 3Check soonFuel System45–120 minutes for initial diagnosisP0203 means Injector Circuit/Open Cylinder 3. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0204Injector Circuit/Open Cylinder 4Check soonFuel System45–120 minutes for initial diagnosisP0204 means Injector Circuit/Open Cylinder 4. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0205Injector Circuit/Open Cylinder 5Check soonFuel System45–120 minutes for initial diagnosisP0205 means Injector Circuit/Open Cylinder 5. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0206Injector Circuit/Open Cylinder 6Check soonFuel System45–120 minutes for initial diagnosisP0206 means Injector Circuit/Open Cylinder 6. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0208Injector Circuit/Open Cylinder 8Check soonFuel System45–120 minutes for initial diagnosisP0208 means Injector Circuit/Open Cylinder 8. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0209Injector Circuit/Open Cylinder 9Check soonFuel System45–120 minutes for initial diagnosisP0209 means Injector Circuit/Open Cylinder 9. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0210Injector Circuit/Open Cylinder 10Check soonFuel System45–120 minutes for initial diagnosisP0210 means Injector Circuit/Open Cylinder 10. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.