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9,253 diagnostic guides

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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 4753–4776 of 7353

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P24CCReductant Tank Cap Switch Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP24CC relates to reductant tank cap switch circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P24CDReductant Tank Cap Switch Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP24CD relates to reductant tank cap switch circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P24CEReductant Tank Cap Switch Circuit HighCheck soonSensors & Electronics30–120 minutes for initial diagnosisP24CE relates to reductant tank cap switch circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P24CFReductant Tank Cap Switch Circuit Intermittent/ErraticCheck soonSensors & Electronics30–120 minutes for initial diagnosisP24CF relates to reductant tank cap switch circuit intermittent/erratic. Check the fault conditions and vehicle-specific procedure before replacing parts.P24D0Particulate Matter Sensor Supply Voltage Circuit LowCheck soonEmissions System30–120 minutes for initial diagnosisP24D0 relates to particulate matter sensor supply voltage circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P24D1Particulate Matter Sensor Regeneration IncompleteCheck soonEmissions System30–120 minutes for initial diagnosisP24D1 relates to particulate matter sensor regeneration incomplete. Check the fault conditions and vehicle-specific procedure before replacing parts.P24D2Reductant Heater A Sense CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP24D2 relates to reductant heater a sense circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P24D3Reductant Heater B Sense CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP24D3 relates to reductant heater b sense circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P24D4EGR Cooler Coolant Pump Feedback CircuitCheck soonEmissions System30–120 minutes for initial diagnosisP24D4 relates to egr cooler coolant pump feedback circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P24D5EVAP System Pressure Sensor/Switch B CircuitLow priorityEmissions System30–120 minutes for initial diagnosisP24D5 relates to evap system pressure sensor/switch b circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P24D6EVAP System Pressure Sensor/Switch B Circuit Range/PerformanceLow priorityEmissions System30–120 minutes for initial diagnosisP24D6 relates to evap system pressure sensor/switch b circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P24D7EVAP System Pressure Sensor/Switch B Circuit LowLow priorityEmissions System30–120 minutes for initial diagnosisP24D7 relates to evap system pressure sensor/switch b circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P24D8EVAP System Pressure Sensor/Switch B Circuit HighLow priorityEmissions System30–120 minutes for initial diagnosisP24D8 relates to evap system pressure sensor/switch b circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P24D9EVAP System Pressure Sensor/Switch B Circuit IntermittentLow priorityEmissions System30–120 minutes for initial diagnosisP24D9 relates to evap system pressure sensor/switch b circuit intermittent. Check the fault conditions and vehicle-specific procedure before replacing parts.P24DAParticulate Matter Sensor Exhaust Sample Error Bank 1Check soonEmissions System30–120 minutes for initial diagnosisP24DA relates to particulate matter sensor exhaust sample error bank 1. Check the fault conditions and vehicle-specific procedure before replacing parts.P24DBReductant Purge Control Valve B Circuit /OpenCheck soonEmissions System30–120 minutes for initial diagnosisP24DB relates to reductant purge control valve b circuit /open. Check the fault conditions and vehicle-specific procedure before replacing parts.P24DCReductant Purge Control Valve B PerformanceCheck soonEmissions System30–120 minutes for initial diagnosisP24DC relates to reductant purge control valve b performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P24DDReductant Purge Control Valve B Circuit LowCheck soonEmissions System30–120 minutes for initial diagnosisP24DD relates to reductant purge control valve b circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P24DEReductant Purge Control Valve B Circuit HighCheck soonEmissions System30–120 minutes for initial diagnosisP24DE relates to reductant purge control valve b circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P24DFReductant Purge Control Valve B Stuck OpenCheck soonEmissions System30–120 minutes for initial diagnosisP24DF relates to reductant purge control valve b stuck open. Check the fault conditions and vehicle-specific procedure before replacing parts.P24E0Reductant Purge Control Valve B Stuck ClosedCheck soonEmissions System30–120 minutes for initial diagnosisP24E0 relates to reductant purge control valve b stuck closed. Check the fault conditions and vehicle-specific procedure before replacing parts.P24E1NH3 Sensor CircuitCheck soonSensors & Electronics30–120 minutes for initial diagnosisP24E1 relates to nh3 sensor circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P24E2NH3 Sensor Circuit Range/PerformanceCheck soonSensors & Electronics30–120 minutes for initial diagnosisP24E2 relates to nh3 sensor circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P24E3NH3 Sensor Circuit LowCheck soonSensors & Electronics30–120 minutes for initial diagnosisP24E3 relates to nh3 sensor circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.