P2422
EVAP Canister Vent Valve Stuck Closed
The vent valve at the canister end of the EVAP system cannot open. Without ambient air entering the canister, fresh fuel cannot purge the stored vapors and refueling may trigger ORVR issues. Common with rusted or rodent-damaged vent valves.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: easy
Symptoms
- Check engine light on
- Possible smell of fuel near tank or engine bay
- Failed emissions inspection
- Loose-cap warning may appear
Common causes
Ordered by how often each turns out to be the cause.
- Vent valve seized closedCommon
- Drive circuit openPossible
- Carbon or debris buildup preventing free movementLess likely
Parts involved
- EVAP Vent Valve
P2422 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.