OBD-II Code · Emissions
P2420
EVAP Switching Valve Circuit High
low severitySafe to drive$100-$400
EVAP switching valve high.
Common symptoms
- CEL
Likely causes
- Failed valve
- Wiring
Where to start
- Try the cheapest cause first. Start by checking: failed valve.
- Cost & scope. $100-$400
- If the code returns after the fix: escalate to a shop or scanner with live-data and freeze-frame. A code that re-sets means the underlying fault is still there.
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