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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 6193–6216 of 7353

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P2B83Charge Air Cooler Coolant Pump A Overspeed/Air In SystemUrgentEngine Problems30–120 minutes for initial diagnosisP2B83 relates to charge air cooler coolant pump a overspeed/air in system. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B84Charge Air Cooler Coolant Pump A UnderspeedCheck soonEngine Problems30–120 minutes for initial diagnosisP2B84 relates to charge air cooler coolant pump a underspeed. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B85Engine Coolant Pump UnderspeedCheck soonEngine Problems30–120 minutes for initial diagnosisP2B85 relates to engine coolant pump underspeed. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B86Coolant Pump A Overspeed/Air in SystemUrgentEngine Problems30–120 minutes for initial diagnosisP2B86 relates to coolant pump a overspeed/air in system. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B87Coolant Pump A UnderspeedCheck soonEngine Problems30–120 minutes for initial diagnosisP2B87 relates to coolant pump a underspeed. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B88Intake Air O2 Sensor Circuit Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2B88 relates to intake air o2 sensor circuit bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B89Intake Air O2 Sensor Circuit Low Voltage Bank 1Check soonElectrical & Charging System30–120 minutes for initial diagnosisP2B89 relates to intake air o2 sensor circuit low voltage bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B8AIntake Air O2 Sensor Circuit High Voltage Bank 1Check soonElectrical & Charging System30–120 minutes for initial diagnosisP2B8A relates to intake air o2 sensor circuit high voltage bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B8BIntake Air O2 Sensor Heater Control Circuit/Open Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2B8B relates to intake air o2 sensor heater control circuit/open bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B8CIntake Air O2 Sensor Heater Control Circuit Range/Performance Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2B8C relates to intake air o2 sensor heater control circuit range/performance bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B8DIntake Air O2 Sensor Heater Control Circuit Low Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2B8D relates to intake air o2 sensor heater control circuit low bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B8EIntake Air O2 Sensor Heater Control Circuit High Bank 1Check soonSensors & Electronics30–120 minutes for initial diagnosisP2B8E relates to intake air o2 sensor heater control circuit high bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B8FTurbocharger/Supercharger B Temperature Sensor CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2B8F relates to turbocharger/supercharger b temperature sensor circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B90Turbocharger/Supercharger B Temperature Sensor Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2B90 relates to turbocharger/supercharger b temperature sensor circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B91Turbocharger/Supercharger B Temperature Sensor Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2B91 relates to turbocharger/supercharger b temperature sensor circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B92Turbocharger/Supercharger B Temperature Sensor Circuit Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2B92 relates to turbocharger/supercharger b temperature sensor circuit circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B93Wastegate Position Sensor A Exceeded Learning LimitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2B93 relates to wastegate position sensor a exceeded learning limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B94Wastegate Position Sensor B Exceeded Learning LimitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2B94 relates to wastegate position sensor b exceeded learning limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B95Cold Start Injection Pulse PerformanceCheck soonFuel System30–120 minutes for initial diagnosisP2B95 relates to cold start injection pulse performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B96Injection Pulse PerformanceCheck soonFuel System30–120 minutes for initial diagnosisP2B96 relates to injection pulse performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B97Exhaust Pressure Control Valve A Position Exceeded Learning LimitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2B97 relates to exhaust pressure control valve a position exceeded learning limit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B98Exhaust Pressure Control Valve A Supply LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2B98 relates to exhaust pressure control valve a supply low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B99Exhaust Pressure Control Valve A Driver Current/Temperature Too HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2B99 relates to exhaust pressure control valve a driver current/temperature too high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B9AReductant Quality Sensor Circuit Intermittent/ErraticCheck soonSensors & Electronics30–120 minutes for initial diagnosisP2B9A relates to reductant quality sensor circuit intermittent/erratic. Check the fault conditions and vehicle-specific procedure before replacing parts.