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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 25–48 of 115

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P0466Purge Flow Sensor Circuit Range/PerformanceLow priorityEmissions System30–120 minutes for initial diagnosisP0466 indicates a fault related to purge flow sensor circuit range/performance. Learn the likely causes and a practical diagnostic order before replacing parts.P0467Purge Flow Sensor Circuit Low InputLow priorityEmissions System30–120 minutes for initial diagnosisP0467 indicates a fault related to purge flow sensor circuit low input. Learn the likely causes and a practical diagnostic order before replacing parts.P0468Purge Flow Sensor Circuit High InputLow priorityEmissions System30–120 minutes for initial diagnosisP0468 indicates a fault related to purge flow sensor circuit high input. Learn the likely causes and a practical diagnostic order before replacing parts.P0469Purge Flow Sensor Circuit IntermittentLow priorityEmissions System30–120 minutes for initial diagnosisP0469 indicates a fault related to purge flow sensor circuit intermittent. Learn the likely causes and a practical diagnostic order before replacing parts.P0496Evaporative Emission System High Purge FlowLow priorityEmissions System30–120 minutes for initial diagnosisP0496 indicates a fault related to evaporative emission system high purge flow. Learn the likely causes and a practical diagnostic order before replacing parts.P0497Evaporative Emission System Low Purge FlowLow priorityEmissions System30–120 minutes for initial diagnosisP0497 indicates a fault related to evaporative emission system low purge flow. Learn the likely causes and a practical diagnostic order before replacing parts.P0498Evaporative Emission System Vent Valve Control Circuit LowLow priorityEmissions System30–120 minutes for initial diagnosisP0498 indicates a fault related to evaporative emission system vent valve control circuit low. Learn the likely causes and a practical diagnostic order before replacing parts.P0499Evaporative Emission System Vent Valve Control Circuit HighLow priorityEmissions System30–120 minutes for initial diagnosisP0499 indicates a fault related to evaporative emission system vent valve control circuit high. Learn the likely causes and a practical diagnostic order before replacing parts.P04ABEVAP System Purge Control Valve B Circuit/OpenLow priorityEmissions System30–120 minutes for initial diagnosisP04AB relates to evap system purge control valve b circuit/open. Check the fault conditions and vehicle-specific procedure before replacing parts.P04ACEVAP System Purge Control Valve B Circuit LowLow priorityEmissions System30–120 minutes for initial diagnosisP04AC relates to evap system purge control valve b circuit low. Check the fault conditions and vehicle-specific procedure before replacing parts.P04ADEVAP System Purge Control Valve B Circuit HighLow priorityEmissions System30–120 minutes for initial diagnosisP04AD relates to evap system purge control valve b circuit high. Check the fault conditions and vehicle-specific procedure before replacing parts.P04AEEVAP System Purge Control Valve B Performance/Stuck OpenLow priorityEmissions System30–120 minutes for initial diagnosisP04AE relates to evap system purge control valve b performance/stuck open. Check the fault conditions and vehicle-specific procedure before replacing parts.P04AFEVAP System Purge Control Valve B Stuck ClosedLow priorityEmissions System30–120 minutes for initial diagnosisP04AF relates to evap system purge control valve b stuck closed. Check the fault conditions and vehicle-specific procedure before replacing parts.P04DFEVAP System Purge Control Valve A Performance/Stuck OpenLow priorityEmissions System30–120 minutes for initial diagnosisP04DF relates to evap system purge control valve a performance/stuck open. Check the fault conditions and vehicle-specific procedure before replacing parts.P04E0EVAP System Purge Control Valve A Stuck ClosedLow priorityEmissions System30–120 minutes for initial diagnosisP04E0 relates to evap system purge control valve a stuck closed. Check the fault conditions and vehicle-specific procedure before replacing parts.P04EAEVAP System Small Leak Detected - Fuel Tank SideLow priorityEmissions System30–120 minutes for initial diagnosisP04EA relates to evap system small leak detected - fuel tank side. Check the fault conditions and vehicle-specific procedure before replacing parts.P04EBEVAP System Small Leak Detected - Fresh Air SideLow priorityEmissions System30–120 minutes for initial diagnosisP04EB relates to evap system small leak detected - fresh air side. Check the fault conditions and vehicle-specific procedure before replacing parts.P04ECEVAP System Large Leak Detected - Fuel Tank SideLow priorityEmissions System30–120 minutes for initial diagnosisP04EC relates to evap system large leak detected - fuel tank side. Check the fault conditions and vehicle-specific procedure before replacing parts.P04EDEVAP System Large Leak Detected - Fresh Air SideLow priorityEmissions System30–120 minutes for initial diagnosisP04ED relates to evap system large leak detected - fresh air side. Check the fault conditions and vehicle-specific procedure before replacing parts.P04EEEVAP System Very Small Leak Detected - Fuel Tank SideLow priorityEmissions System30–120 minutes for initial diagnosisP04EE relates to evap system very small leak detected - fuel tank side. Check the fault conditions and vehicle-specific procedure before replacing parts.P04EFEVAP System Very Small Leak Detected - Fresh Air SideLow priorityEmissions System30–120 minutes for initial diagnosisP04EF relates to evap system very small leak detected - fresh air side. Check the fault conditions and vehicle-specific procedure before replacing parts.P04F0EVAP System High Load Purge Line A PerformanceLow priorityEmissions System30–120 minutes for initial diagnosisP04F0 relates to evap system high load purge line a performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P04F1EVAP System Purge Line PerformanceLow priorityEmissions System30–120 minutes for initial diagnosisP04F1 relates to evap system purge line performance. Check the fault conditions and vehicle-specific procedure before replacing parts.P0535A/C Evaporator Temperature Sensor CircuitLow priorityEmissions System30–120 minutes for initial diagnosisP0535 relates to a/c evaporator temperature sensor circuit. Check the fault conditions and vehicle-specific procedure before replacing parts.