Refueling Vapor Control Valve Circuit Low

Where it lives

For P04B1, the valve sits on the circuit this code reports. The description of P04B1 reports a fault at the valve.

Check these first

• Refueling vapor control valve signal pulled low
• A short to ground in the refueling vapor valve circuit
• A weak refueling vapor valve coil drawing low current
• Corrosion at the refueling vapor valve connector
• Low battery voltage starving the valve circuit

What to do next

1. Check battery voltage and charge if low
2. Inspect the refueling vapor valve connector for corrosion
3. Test the refueling vapor valve coil and wiring
4. Command the refueling vapor valve on and watch current
5. Replace the refueling vapor control valve if the signal stays low
6. Clear the code and retest

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