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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 4297–4320 of 7353

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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.P230ACylinder 1 Air-Fuel Ratio Imbalance - Adjustment At Limit During BalanceCheck soonFuel System30–120 minutes for initial diagnosisP230A relates to cylinder 1 air-fuel ratio imbalance - adjustment at limit during balance. Check the fault conditions and vehicle-specific procedure before replacing parts.P230BCylinder 2 Air-Fuel Ratio Imbalance - Adjustment At Limit During BalanceCheck soonFuel System30–120 minutes for initial diagnosisP230B relates to cylinder 2 air-fuel ratio imbalance - adjustment at limit during balance. Check the fault conditions and vehicle-specific procedure before replacing parts.P230CCylinder 3 Air-Fuel Ratio Imbalance - Adjustment At Limit During BalanceCheck soonFuel System30–120 minutes for initial diagnosisP230C relates to cylinder 3 air-fuel ratio imbalance - adjustment at limit during balance. Check the fault conditions and vehicle-specific procedure before replacing parts.P230DCylinder 4 Air-Fuel Ratio Imbalance - Adjustment At Limit During BalanceCheck soonFuel System30–120 minutes for initial diagnosisP230D relates to cylinder 4 air-fuel ratio imbalance - adjustment at limit during balance. Check the fault conditions and vehicle-specific procedure before replacing parts.P230ECylinder 5 Air-Fuel Ratio Imbalance - Adjustment At Limit During BalanceCheck soonFuel System30–120 minutes for initial diagnosisP230E relates to cylinder 5 air-fuel ratio imbalance - adjustment at limit during balance. Check the fault conditions and vehicle-specific procedure before replacing parts.P230FCylinder 6 Air-Fuel Ratio Imbalance - Adjustment At Limit During BalanceCheck soonFuel System30–120 minutes for initial diagnosisP230F relates to cylinder 6 air-fuel ratio imbalance - adjustment at limit during balance. 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.P2312Ignition Coil E Primary Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2312 relates to ignition coil e primary control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2313Ignition Coil E Primary Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2313 relates to ignition coil e primary control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2314Ignition Coil E Secondary CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2314 relates to ignition coil e secondary circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2315Ignition Coil F Primary Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2315 relates to ignition coil f primary control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2316Ignition Coil F Primary Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2316 relates to ignition coil f primary control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2317Ignition Coil F Secondary CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2317 relates to ignition coil f secondary circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2318Ignition Coil G Primary Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2318 relates to ignition coil g primary control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2319Ignition Coil G Primary Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2319 relates to ignition coil g primary control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P231ACylinder 7 Air-Fuel Ratio Imbalance - Adjustment At Limit During BalanceCheck soonFuel System30–120 minutes for initial diagnosisP231A relates to cylinder 7 air-fuel ratio imbalance - adjustment at limit during balance. Check the fault conditions and vehicle-specific procedure before replacing parts.P231BCylinder 8 Air-Fuel Ratio Imbalance - Adjustment At Limit During BalanceCheck soonFuel System30–120 minutes for initial diagnosisP231B relates to cylinder 8 air-fuel ratio imbalance - adjustment at limit during balance. Check the fault conditions and vehicle-specific procedure before replacing parts.