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9,253 diagnostic guides
Find codes by symptomChoose what you notice to search matching code guides.
Rough idle or shakingVibration while stoppedHard to startLong cranking or no-startEngine stallsCuts out at idle or on the roadHesitates or loses powerSlow response when acceleratingBattery light is onCharging system warningHarsh 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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Diagnostic codes
Showing 433–456 of 515
P2569Direct Ozone Reduction Catalyst Temperature Sensor Circuit LowCheck soonEmissions System30–120 minutes for initial diagnosisP2570Direct Ozone Reduction Catalyst Temperature Sensor Circuit HighCheck soonEmissions System30–120 minutes for initial diagnosisP2571Direct Ozone Reduction Catalyst Temperature Sensor Circuit Intermittent/ErraticCheck soonEmissions System30–120 minutes for initial diagnosisP2572Direct Ozone Reduction Catalyst Deterioration Sensor CircuitCheck soonEmissions System30–120 minutes for initial diagnosisP2573Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Range/PerformanceCheck soonEmissions System30–120 minutes for initial diagnosisP2574Direct Ozone Reduction Catalyst Deterioration Sensor Circuit LowCheck soonEmissions System30–120 minutes for initial diagnosisP2575Direct Ozone Reduction Catalyst Deterioration Sensor Circuit HighCheck soonEmissions System30–120 minutes for initial diagnosisP2576Direct Ozone Reduction Catalyst Deterioration Sensor Circuit Intermittent/ErraticCheck soonEmissions System30–120 minutes for initial diagnosisP2577Direct Ozone Reduction Catalyst Efficiency Below ThresholdLow priorityEmissions System30–120 minutes for initial diagnosisP260EParticulate Filter Regeneration Lamp Control CircuitCheck soonEmissions System30–120 minutes for initial diagnosisP260FEVAP System Monitoring Processor PerformanceLow priorityEmissions System30–120 minutes for initial diagnosisP26FBEGR Cooler Bypass Control Stuck Closed Bank 1Check soonEmissions System30–120 minutes for initial diagnosisP26FCEGR Cooler Bypass Control Stuck Closed Bank 2Check soonEmissions System30–120 minutes for initial diagnosisP28C3EVAP System High Load Purge Line B PerformanceLow priorityEmissions System30–120 minutes for initial diagnosisP2AA3Cold Start EGR B Flow Insufficient DetectedCheck soonEmissions System30–120 minutes for initial diagnosisP2AA4Cold Start EGR B Flow Excessive DetectedCheck soonEmissions System30–120 minutes for initial diagnosisP2AA5EGR Cooler Bypass Control Circuit Driver Current/Temperature Too High Bank 1Check soonEmissions System30–120 minutes for initial diagnosisP2AA6EGR Cooler Bypass Control Circuit Driver Current/Temperature Too High Bank 2Check soonEmissions System30–120 minutes for initial diagnosisP2AB0Particulate Matter Sensor Processor PerformanceCheck soonEmissions System30–120 minutes for initial diagnosisP2AB1Catalyst Heater Control Module PerformanceCheck soonEmissions System30–120 minutes for initial diagnosisP2AB2Catalyst Heater Control Module Supply VoltageCheck soonEmissions System30–120 minutes for initial diagnosisP2B7AEVAP System Pressure Sensor/Switch C CircuitLow priorityEmissions System30–120 minutes for initial diagnosisP2B7BEVAP System Pressure Sensor/Switch C Circuit Range/PerformanceLow priorityEmissions System30–120 minutes for initial diagnosisP2B7CEVAP System Pressure Sensor/Switch C Circuit LowLow priorityEmissions System30–120 minutes for initial diagnosis