P2418 code meaning
EVAP System Switching Valve Control Circuit/Open
Powertrain system Generic code P24xx codes Check engine light
What P2418 means
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.
P2418 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2418
- Check engine light
- EVAP readiness not set
- Possible fuel vapour odour or slow refuelling
Common causes of P2418
- Most likelyBroken control wire or unplugged valve connector
- PossibleOpen solenoid coil in the switching valve
- Less likelyCorroded connector near the tank (road salt, splash water)
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
EVAP switching valveValve wiringECM
What each part of P2418 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 4 | Area: auxiliary emission controls (catalytic converter, EGR, EVAP). |
| 18 | The exact fault in that area. |
What to do next
- Note P2418 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2418
What does P2418 mean?
P2418 means "EVAP System Switching Valve Control Circuit/Open". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P2418?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P2418 fail an emissions test?
Yes, it can. P2418 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2418 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2418 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.