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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 1441–1464 of 1570

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P2D77Battery Charger Control Module B PerformanceCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D77 relates to battery charger control module b performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D78Battery Charger Control Module B Processor PerformanceCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D78 relates to battery charger control module b processor performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D79Charging Stop Switch CircuitCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D79 relates to charging stop switch circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D7ACharging Stop Switch Circuit HighCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D7A relates to charging stop switch circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D7BCharging Stop Switch Circuit LowCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D7B relates to charging stop switch circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D7CCharging Stop Switch Circuit PerformanceCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D7C relates to charging stop switch circuit performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D7DCharging Stop Switch Circuit Intermittent/ErraticCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D7D relates to charging stop switch circuit intermittent/erratic. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D7ECharging Start Switch CircuitCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D7E relates to charging start switch circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D7FCharging Start Switch Circuit HighCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D7F relates to charging start switch circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D80Charging Start Switch Circuit LowCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D80 relates to charging start switch circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D81Charging Start Switch Circuit PerformanceCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D81 relates to charging start switch circuit performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D82Charging Start Switch Circuit Intermittent/ErraticCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D82 relates to charging start switch circuit intermittent/erratic. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D83Battery Charger B Input Current Sensor Circuit LowCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D83 relates to battery charger b input current sensor circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D84Battery Charger B Input Current Sensor Circuit HighCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D84 relates to battery charger b input current sensor circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D85Battery Charger B Input Current Sensor Circuit Range/PerformanceCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D85 relates to battery charger b input current sensor circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D89Fan 1 Control Module Supply Voltage CircuitCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D89 relates to fan 1 control module supply voltage circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D8CFan 2 Control Module Supply Voltage CircuitCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D8C relates to fan 2 control module supply voltage circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D92Starter/Generator Phase X Current Sensor Circuit HighCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D92 relates to starter/generator phase x current sensor circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D93Starter/Generator Phase Y Current Sensor Circuit HighCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D93 relates to starter/generator phase y current sensor circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D94Starter/Generator Phase Z Current Sensor Circuit HighCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D94 relates to starter/generator phase z current sensor circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D95Starter/Generator Phase X Current Sensor Circuit LowCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D95 relates to starter/generator phase x current sensor circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D96Starter/Generator Phase Y Current Sensor Circuit LowCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D96 relates to starter/generator phase y current sensor circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D97Starter/Generator Phase Z Current Sensor Circuit LowCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D97 relates to starter/generator phase z current sensor circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2D98Starter/Generator Phase X Current Circuit Intermittent/ErraticCheck soonElectrical & Charging System30–120 minutes for initial diagnosisP2D98 relates to starter/generator phase x current circuit intermittent/erratic. Check the fault conditions and vehicle-specific procedure before replacing parts.