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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 4321–4344 of 7353

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P231CCylinder 9 Air-Fuel Ratio Imbalance - Adjustment At Limit During BalanceCheck soonFuel System30–120 minutes for initial diagnosisP231C relates to cylinder 9 air-fuel ratio imbalance - adjustment at limit during balance. Check the fault conditions and vehicle-specific procedure before replacing parts.P231DCylinder 10 Air-Fuel Ratio Imbalance - Adjustment At Limit During BalanceCheck soonFuel System30–120 minutes for initial diagnosisP231D relates to cylinder 10 air-fuel ratio imbalance - adjustment at limit during balance. Check the fault conditions and vehicle-specific procedure before replacing parts.P231ECylinder 11 Air-Fuel Ratio Imbalance - Adjustment At Limit During BalanceCheck soonFuel System30–120 minutes for initial diagnosisP231E relates to cylinder 11 air-fuel ratio imbalance - adjustment at limit during balance. Check the fault conditions and vehicle-specific procedure before replacing parts.P231FCylinder 12 Air-Fuel Ratio Imbalance - Adjustment At Limit During BalanceCheck soonFuel System30–120 minutes for initial diagnosisP231F relates to cylinder 12 air-fuel ratio imbalance - adjustment at limit during balance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2320Ignition Coil G Secondary CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2320 relates to ignition coil g secondary circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2321Ignition Coil H Primary Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2321 relates to ignition coil h primary control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2322Ignition Coil H Primary Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2322 relates to ignition coil h primary control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2323Ignition Coil H Secondary CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2323 relates to ignition coil h secondary circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2324Ignition Coil I Primary Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2324 relates to ignition coil i primary control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2325Ignition Coil I Primary Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2325 relates to ignition coil i primary control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2326Ignition Coil I Secondary CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2326 relates to ignition coil i secondary circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2327Ignition Coil J Primary Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2327 relates to ignition coil j primary control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2328Ignition Coil J Primary Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2328 relates to ignition coil j primary control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2329Ignition Coil J Secondary CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2329 relates to ignition coil j secondary circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P232ATCM Request - Forced Engine ShutdownCheck soonSensors & Electronics30–120 minutes for initial diagnosisP232A relates to tcm request - forced engine shutdown. Check the fault conditions and vehicle-specific procedure before replacing parts.P232BCylinder 11 Fuel Injector A Offset Learning At Min LimitCheck soonFuel System30–120 minutes for initial diagnosisP232B relates to cylinder 11 fuel injector a offset learning at min limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P232CCylinder 11 Fuel Injector A Offset Learning At Max LimitCheck soonFuel System30–120 minutes for initial diagnosisP232C relates to cylinder 11 fuel injector a offset learning at max limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P232DCylinder 12 Fuel Injector A Offset Learning At Min LimitCheck soonFuel System30–120 minutes for initial diagnosisP232D relates to cylinder 12 fuel injector a offset learning at min limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P232ECylinder 12 Fuel Injector A Offset Learning At Max LimitCheck soonFuel System30–120 minutes for initial diagnosisP232E relates to cylinder 12 fuel injector a offset learning at max limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P232FO2 Sensor Out of Range During Deceleration Bank 1 Sensor 2Check soonSensors & Electronics30–120 minutes for initial diagnosisP232F relates to o2 sensor out of range during deceleration bank 1 sensor 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P2330Ignition Coil K Primary Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2330 relates to ignition coil k primary control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2331Ignition Coil K Primary Control Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2331 relates to ignition coil k primary control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2332Ignition Coil K Secondary CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2332 relates to ignition coil k secondary circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2333Ignition Coil L Primary Control Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2333 relates to ignition coil l primary control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.