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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 265–288 of 305

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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.P0052Heated Oxygen Sensor Heater Control Circuit High Bank 2 Sensor 1Low prioritySensors & Electronics45–120 minutes for initial diagnosisP0052 means Heated Oxygen Sensor Heater Control Circuit High Bank 2 Sensor 1. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0053Heated Oxygen Sensor Heater Resistance Bank 1 Sensor 1Low prioritySensors & Electronics45–120 minutes for initial diagnosisP0053 means Heated Oxygen Sensor Heater Resistance Bank 1 Sensor 1. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0054Heated Oxygen Sensor Heater Resistance Bank 1 Sensor 2Low prioritySensors & Electronics45–120 minutes for initial diagnosisP0054 means Heated Oxygen Sensor Heater Resistance Bank 1 Sensor 2. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0055Heated Oxygen Sensor Heater Resistance Bank 1 Sensor 3Low prioritySensors & Electronics45–120 minutes for initial diagnosisP0055 means Heated Oxygen Sensor Heater Resistance Bank 1 Sensor 3. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0058Heated Oxygen Sensor Heater Control Circuit High Bank 2 Sensor 2Low prioritySensors & Electronics45–120 minutes for initial diagnosisP0058 means Heated Oxygen Sensor Heater Control Circuit High Bank 2 Sensor 2. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0059Heated Oxygen Sensor Heater Resistance Bank 2 Sensor 1Low prioritySensors & Electronics45–120 minutes for initial diagnosisP0059 means Heated Oxygen Sensor Heater Resistance Bank 2 Sensor 1. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0060Heated Oxygen Sensor Heater Resistance Bank 2 Sensor 2Low prioritySensors & Electronics45–120 minutes for initial diagnosisP0060 means Heated Oxygen Sensor Heater Resistance Bank 2 Sensor 2. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0061Heated Oxygen Sensor Heater Resistance Bank 2 Sensor 3Low prioritySensors & Electronics45–120 minutes for initial diagnosisP0061 means Heated Oxygen Sensor Heater Resistance Bank 2 Sensor 3. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0062Heated Oxygen Sensor Heater Control Circuit Bank 2 Sensor 3Low prioritySensors & Electronics45–120 minutes for initial diagnosisP0062 means Heated Oxygen Sensor Heater Control Circuit Bank 2 Sensor 3. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0063Heated Oxygen Sensor Heater Control Circuit Low Bank 2 Sensor 3Low prioritySensors & Electronics45–120 minutes for initial diagnosisP0063 means Heated Oxygen Sensor Heater Control Circuit Low Bank 2 Sensor 3. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0064Heated Oxygen Sensor Heater Control Circuit High Bank 2 Sensor 3Low prioritySensors & Electronics45–120 minutes for initial diagnosisP0064 means Heated Oxygen Sensor Heater Control Circuit High Bank 2 Sensor 3. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0070Ambient Air Temperature Sensor CircuitLow prioritySensors & Electronics30–90 minutes for initial diagnosisP0070 means Ambient Air Temperature Sensor Circuit. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0072Ambient Air Temperature Sensor Circuit LowLow prioritySensors & Electronics45–120 minutes for initial diagnosisP0072 means Ambient Air Temperature Sensor Circuit Low. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0073Ambient Air Temperature Sensor Circuit HighLow prioritySensors & Electronics30–90 minutes for initial diagnosisP0073 means Ambient Air Temperature Sensor Circuit High. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0074Ambient Air Temperature Sensor Circuit IntermittentLow prioritySensors & Electronics45–120 minutes for initial diagnosisP0074 means Ambient Air Temperature Sensor Circuit Intermittent. Learn the likely symptoms, causes, safety implications, and a practical diagnostic order.P0137Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2Low prioritySensors & Electronics30–90 minutes for initial diagnosisP0137 means Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.P0138Oxygen Sensor Circuit High Voltage Bank 1 Sensor 2Low prioritySensors & Electronics30–90 minutes for initial diagnosisP0138 means Oxygen Sensor Circuit High Voltage Bank 1 Sensor 2. Learn the likely symptoms, common causes, and a safe diagnostic order before replacing parts.