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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.

Low priority P · Powertrain Clear all

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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 241–264 of 298

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P25DCFuel Level Sensor C StuckLow priorityFuel System30–120 minutes for initial diagnosisP25DC relates to fuel level sensor c stuck. Check the fault conditions and vehicle-specific procedure before replacing parts.P260FEVAP System Monitoring Processor PerformanceLow priorityEmissions System30–120 minutes for initial diagnosisP260F relates to evap system monitoring processor performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2611A/C Refrigerant Distribution Valve A Control Circuit/OpenLow prioritySensors & Electronics30–120 minutes for initial diagnosisP2611 relates to a/c refrigerant distribution valve a control circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P2612A/C Refrigerant Distribution Valve A Control Circuit LowLow prioritySensors & Electronics30–120 minutes for initial diagnosisP2612 relates to a/c refrigerant distribution valve a control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2613A/C Refrigerant Distribution Valve A Control Circuit HighLow prioritySensors & Electronics30–120 minutes for initial diagnosisP2613 relates to a/c refrigerant distribution valve a control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P265FVariable A/C Compressor Control Circuit Range/PerformanceLow prioritySensors & Electronics30–120 minutes for initial diagnosisP265F relates to variable a/c compressor control circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P26FDA/C Compressor Internal Control Module PerformanceLow prioritySensors & Electronics30–120 minutes for initial diagnosisP26FD relates to a/c compressor internal control module performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P28C3EVAP System High Load Purge Line B PerformanceLow priorityEmissions System30–120 minutes for initial diagnosisP28C3 relates to evap system high load purge line b performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B7AEVAP System Pressure Sensor/Switch C CircuitLow priorityEmissions System30–120 minutes for initial diagnosisP2B7A relates to evap system pressure sensor/switch c circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B7BEVAP System Pressure Sensor/Switch C Circuit Range/PerformanceLow priorityEmissions System30–120 minutes for initial diagnosisP2B7B relates to evap system pressure sensor/switch c circuit range/performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B7CEVAP System Pressure Sensor/Switch C Circuit LowLow priorityEmissions System30–120 minutes for initial diagnosisP2B7C relates to evap system pressure sensor/switch c circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B7DEVAP System Pressure Sensor/Switch C Circuit HighLow priorityEmissions System30–120 minutes for initial diagnosisP2B7D relates to evap system pressure sensor/switch c circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2B7EEVAP System Pressure Sensor/Switch C Circuit IntermittentLow priorityEmissions System30–120 minutes for initial diagnosisP2B7E relates to evap system pressure sensor/switch c circuit intermittent. Check the fault conditions and vehicle-specific procedure before replacing parts.P2C51Fuel Level Sensor A/B CorrelationLow priorityFuel System30–120 minutes for initial diagnosisP2C51 relates to fuel level sensor a/b correlation. Check the fault conditions and vehicle-specific procedure before replacing parts.P2C7ASCR NOx Catalyst Efficiency Below Threshold Bank 1 Catalyst 2Low priorityEmissions System30–120 minutes for initial diagnosisP2C7A relates to scr nox catalyst efficiency below threshold bank 1 catalyst 2. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CD4A/C Refrigerant Pressure Sensor A/B CorrelationLow prioritySensors & Electronics30–120 minutes for initial diagnosisP2CD4 relates to a/c refrigerant pressure sensor a/b correlation. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CFCA/C Clutch Control CircuitLow priorityTransmission Issues30–120 minutes for initial diagnosisP2CFC relates to a/c clutch control circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CFDA/C Clutch Control Circuit LowLow priorityTransmission Issues30–120 minutes for initial diagnosisP2CFD relates to a/c clutch control circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P2CFEA/C Clutch Control Circuit HighLow priorityTransmission Issues30–120 minutes for initial diagnosisP2CFE relates to a/c clutch control circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P2DD9EVAP System Leak Detection Pump Control Circuit PerformanceLow priorityEmissions System30–120 minutes for initial diagnosisP2DD9 relates to evap system leak detection pump control circuit performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2DDAEVAP System Leak Detection Pump Performance/Stuck OffLow priorityEmissions System30–120 minutes for initial diagnosisP2DDA relates to evap system leak detection pump performance/stuck off. Check the fault conditions and vehicle-specific procedure before replacing parts.P2DDBEVAP System Leak Detection Pump Stuck OnLow priorityEmissions System30–120 minutes for initial diagnosisP2DDB relates to evap system leak detection pump stuck on. Check the fault conditions and vehicle-specific procedure before replacing parts.P2DFDEVAP System Purge Pump PerformanceLow priorityEmissions System30–120 minutes for initial diagnosisP2DFD relates to evap system purge pump performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P2E80A/C Compressor Control Module InternalTemperature Sensor B Circuit Intermittent/ErraticLow prioritySensors & Electronics30–120 minutes for initial diagnosisP2E80 relates to a/c compressor control module internaltemperature sensor b circuit intermittent/erratic. Check the fault conditions and vehicle-specific procedure before replacing parts.