Powertrain
generic / SAE
P2418
EVAP Switching Valve Control Circuit Performance
The evaporative switching valve — used on multi-path EVAP systems to route purge or pressure-test flow — does not respond as expected. Self-test fails because tank pressure does not change in the calibrated direction.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number4 / 18
Possible causes
- Switching valve failed high
- EVAP line blocked or kinked medium
Symptoms
- Check engine light on
- Possible smell of fuel near tank or engine bay
- Failed emissions inspection
- Loose-cap warning may appear
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 60–400 €
- Estimated time: 0.5–2 h
- Component: evap switching valve
- Component: evap lines
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012