EVAP System Switching Valve Control Circuit Open
The P2418 code means the vehicle's onboard diagnostic system has detected: EVAP System Switching Valve Control Circuit Open. This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $75 - $350 (parts and labor)
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Common Symptoms
- Check Engine Light illuminated
- Failed emissions test
- No drivability symptoms
- EVAP system monitor not completing
- Possible faint fuel vapor smell
Probable Causes (Ranked by Likelihood)
- Failed EVAP switching valve or solenoid Very High
- Damaged wiring to EVAP switching valve High
- Corroded connector at EVAP valve Moderate
- Blown EVAP solenoid fuse Low
Step-by-Step Diagnostic Procedure
-
Check the EVAP solenoid fuse
-
Locate the EVAP switching valve and check its connector
-
Measure solenoid coil resistance
-
Inspect wiring from ECM to the EVAP valve
-
Command the valve with a scan tool and listen for a click
Common Fixes by Vehicle
What techs usually find when diagnosing P2418 on specific vehicles — tap your vehicle for the fix and the exact part:
2007-2016 Chrysler & Mercedes-Benz easy DIY
EVAP switching valve circuit fault is typically the purge/switching valve solenoid or its connector. The valve sticks or fails electrically. Verify the valve clicks when commanded with a scan tool. Replace the switching/purge valve and inspect the vacuum lines to it for cracks.
Labor: 30-60 minFrequently Asked Questions
Can I drive with code P2418?
Yes, completely safe to drive. Only the EVAP purge system is affected and there is no impact on driving performance.
What causes P2418?
Usually a failed EVAP switching valve or open wiring. The valve is typically located near the charcoal canister or intake manifold.
Is P2418 expensive to fix?
Typically $75 to $350. EVAP solenoid valves are inexpensive parts and straightforward to replace.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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