P2419
EVAP Switching Valve Stuck Open
The EVAP switching valve cannot close. Tank pressure cannot be isolated for the leak detection test, and purge routing may bypass the canister.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
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.
- Valve stuck open mechanicallyCommon
- Drive circuit always energisedPossible
- Carbon or debris buildup preventing free movementLess likely
Parts involved
- EVAP Switching Valve
P2419 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.