Code result
P2420
EVAP Switching Valve Stuck Closed
Moderate severity
What it means
The EVAP switching valve cannot open when commanded. Purge or test flow cannot reach the appropriate path and the leak monitor aborts.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Valve stuck closed mechanically
highOne of the most commonly reported causes for this code — check this first.
Drive circuit open
mediumA plausible cause — test and verify before replacing parts.
Carbon or debris buildup preventing free movement
lowLess common, but worth ruling out after the more likely causes.
Related help
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