OBD-II code · Powertrain (generic, extended)
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.
Is it safe to drive with P2418?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySwitching valve failed
- PossibleEVAP line blocked or kinked
Symptoms
- Check engine light on
- Possible smell of fuel near tank or engine bay
- Failed emissions inspection
- Loose-cap warning may appear
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Evap Switching Valve, Evap Lines
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.