P04E0
EVAP System Purge Control Valve A Stuck Closed
Same as P04AF on EVAP purge valve A. The evaporative system captures fuel vapor from the tank and purges it into intake; leaks or stuck purge valves leak hydrocarbons and cause emissions failures.
Same as P04AF on EVAP purge valve A. The evaporative system captures fuel vapor from the tank and purges it into intake; leaks or stuck purge valves leak hydrocarbons and cause emissions failures.
Common causes
- high
Valve stuck closed
One of the most commonly reported causes for this code — check this first.
Typical part cost: $130-390
- low
Carbon or debris buildup preventing free movement
Less common, but worth ruling out after the more likely causes.
Typical part cost: $130-390
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does P04E0 mean?
P04E0 means "EVAP System Purge Control Valve A Stuck Closed". It is a generic OBD-II code that points to a fault in the auxiliary emission controls.
What are the most common causes of P04E0?
valve stuck closed; carbon or debris buildup preventing free movement; component wear with age - mechanical play — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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