2011 Ford Escape Fuel Fill Intake Code Returning After Replacement

Your 2011 Escape throwing a fuel fill intake code again after a previous repair usually points to an EVAP system leak or venting problem. The most likely cause is a cracked or leaking EVAP hose or a faulty purge valve. The filler neck itself can also cause issues if it’s damaged or clogged.

Most likely culprits

• EVAP system hoses: These rubber lines dry out and crack over time, causing leaks that trigger codes.
• EVAP canister purge valve: If it sticks open or closed, it can cause improper venting and set codes.
• Fuel filler neck: Damage or blockage here can cause pressure issues detected by the EVAP system.

How to narrow it down

1. Visually inspect all EVAP hoses around the filler neck and charcoal canister for cracks, loose clamps, or disconnections. A quick fix if found.
2. Use a smoke machine to pressurize the EVAP system and watch for escaping smoke. This will pinpoint leaks.
3. Check the purge valve operation by applying 12V to it and listening for clicking or using a scan tool to command it open/close.
4. Inspect the fuel filler neck for dents, rust, or blockages that could restrict venting.
5. Clear the code and do a drive cycle after repairs to confirm if the issue is resolved.

Possible parts (if needed)

• EVAP system hoses (replace cracked or brittle lines)
• EVAP canister purge valve (if it fails functional test)
• Fuel filler neck (if physically damaged or venting blocked)
• EVAP canister (less common, only if other parts check out)

A few questions

• What exact code(s) is the scanner showing? (P0440, P0455, etc.)
• Was the previous repair a filler neck replacement or EVAP component?
• Any fuel smell or visible leaks around the filler area?
• Has the check engine light been steady or intermittent?
• Have you noticed any drivability issues or just the code?