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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

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 1105–1128 of 1939

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P22D3Turbocharger Turbine Inlet Valve Stuck ClosedCheck soonSensors & Electronics30–120 minutes for initial diagnosisP22D3 relates to turbocharger turbine inlet valve stuck closed. Check the fault conditions and vehicle-specific procedure before replacing parts.P22D4Turbocharger Turbine Inlet Valve Position Sensor CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP22D4 relates to turbocharger turbine inlet valve position sensor circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P22D5Turbocharger Turbine Inlet Valve Position Sensor Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP22D5 relates to turbocharger turbine inlet valve position sensor circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P22D6Turbocharger Turbine Inlet Valve Position Sensor Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP22D6 relates to turbocharger turbine inlet valve position sensor circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P22D7Turbocharger Turbine Inlet Valve Position Sensor Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP22D7 relates to turbocharger turbine inlet valve position sensor circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P22D8Turbocharger Turbine Inlet Valve Position Sensor Circuit Intermittent/ErraticCheck soonSensors & Electronics30–120 minutes for initial diagnosisP22D8 relates to turbocharger turbine inlet valve position sensor circuit intermittent/erratic. Check the fault conditions and vehicle-specific procedure before replacing parts.P22F9NOx Sensor Performance - Slow Response Low to High Bank 1 Sensor 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP22F9 relates to nox sensor performance - slow response low to high bank 1 sensor 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P22FANOx Sensor Performance - Slow Response High to Low Bank 1 Sensor 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP22FA relates to nox sensor performance - slow response high to low bank 1 sensor 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P22FBNOx Sensor Performance - Sensing Element Bank 1 Sensor 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP22FB relates to nox sensor performance - sensing element bank 1 sensor 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P22FCNOx Sensor Performance - Slow Response Low to High Bank 1 Sensor 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP22FC relates to nox sensor performance - slow response low to high bank 1 sensor 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P22FDNOx Sensor Performance - Slow Response High to Low Bank 1 Sensor 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP22FD relates to nox sensor performance - slow response high to low bank 1 sensor 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P22FENOx Sensor Performance - Sensing Element Bank 1 Sensor 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP22FE relates to nox sensor performance - sensing element bank 1 sensor 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P2300Ignition Coil A Primary Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2300 relates to ignition coil a primary control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2301Ignition Coil A Primary Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2301 relates to ignition coil a primary control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2302Ignition Coil A Secondary CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2302 relates to ignition coil a secondary circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2303Ignition Coil B Primary Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2303 relates to ignition coil b primary control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2304Ignition Coil B Primary Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2304 relates to ignition coil b primary control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2305Ignition Coil B Secondary CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2305 relates to ignition coil b secondary circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2306Ignition Coil C Primary Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2306 relates to ignition coil c primary control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2307Ignition Coil C Primary Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2307 relates to ignition coil c primary control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2308Ignition Coil C Secondary CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2308 relates to ignition coil c secondary circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2309Ignition Coil D Primary Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2309 relates to ignition coil d primary control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2310Ignition Coil D Primary Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2310 relates to ignition coil d primary control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2311Ignition Coil D Secondary CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2311 relates to ignition coil d secondary circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.