P04E0EVAP System Purge Control Valve A Stuck Closed
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- Purge valve A is the main EVAP purge valve between charcoal canister and intake manifold (on turbo engines the low-load path); its electrical circuit faults are P0443, P0458 and P0459. No manufacturer document available to us uses this code; the description follows GM's comparable check P0496, Subaru's valve B counterpart P04AE and CARB's purge flow requirement. P04E0 means valve A does not open although it is driven: no vacuum builds up in the tank and the mixture does not react while purging – CARB requires missing purge flow to be detected. The canister is then not purged and saturates, causing fuel smell and early nozzle shut-off.
- What you may notice
- Check engine light on
- Fuel smell
- Nozzle clicks off early when refuelling
- Likely causes
- LikelyPurge valve A stuck closed (gummed, charcoal dust, spring or armature)
- PossiblePurge line kinked or blocked
- RareCanister or vent blocked
- RareTank pressure sensor faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Easy · Often possible to do yourself.Typical cost: €40 – €250
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.