Refueling Vapor Control Valve Stuck Closed

Where it lives

For P04B4, the description names the valve as the part involved.

Check these first

• A refueling vapor valve stuck closed
• Carbon or debris locking the valve closed
• A failed refueling vapor valve solenoid
• A blocked vapor line to the canister

What to do next

1. Command the refueling vapor valve open on a scan tool
2. Check the valve for carbon or debris holding it closed
3. Inspect the vapor line to the canister for a blockage
4. Replace the refueling vapor valve if it stays closed
5. Clear the code and retest

Look up another code