P2418EVAP System Switching Valve Control Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2418 is the electrical check of the control circuit of the EVAP switching valve - an extra valve in the evaporative system whose job depends on the design. Ford calls it EVAP switching valve or vapor blocking valve; its 2012 and 2020-2023 OBD summaries check the driver continuously and set P2418 when a short, open or intermittent fault persists for more than 5 s, so at Ford this one code covers all circuit faults. Karma's Revero and GS-6 bulletin uses P2418 for the open control circuit of the rear fuel tank isolation valve driven by the ECM. P2419/P2420 separate low and high circuit faults, P2450 is the mechanical stuck-open fault. While the valve cannot be controlled, leak tests are suspended and fuel vapour odour or refuelling trouble may follow.
- What you may notice
- Check engine light
- EVAP readiness not set
- Possible fuel vapour odour or slow refuelling
- Likely causes
- LikelyBroken control wire or unplugged valve connector
- PossibleOpen solenoid coil in the switching valve
- RareCorroded connector near the tank (road salt, splash water)
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €40 – €350
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.