Parts for your 2016 Ford Mondeo-Fuel cap

2016 Ford Mondeo fuel cap: capless Easy Fuel system explained

For the 2016 Ford Mondeo, a separate screw-on fuel cap is not fitted. Ford equips this model with its Easy Fuel capless refuelling system. This is documented in the 2016 Mondeo Owner’s Manual under “Capless refuelling,” and supported by Ford workshop literature for the CD391 platform (Fuel System 310-01) describing the filler neck with integrated misfuelling protection. Ford’s own Easy Fuel technical notes explain the spring-loaded, self-sealing design that replaces a traditional cap.

Why no cap? Ford’s capless inlet is designed to make refuelling simpler, cleaner and more secure. The nozzle at the bowser opens a pair of internal seals, delivers petrol or diesel, then the seals snap shut to maintain the evaporative emissions integrity. The system also helps prevent misfuelling: petrol and diesel nozzles are different sizes, and the Mondeo’s inlet checks for the correct diameter before opening. With no cap to forget or leave loose, owners avoid common EVAP leak faults caused by poorly tightened caps.

While there’s nothing to “replace” as a separate cap, the filler inlet still benefits from a little care as part of routine servicing of a 2016 Ford Mondeo.

• Keep the filler area clean. Wipe away dust, sand, or leaf litter around the flap and door so debris can’t sit on the seals.
• Open and close the fuel door to confirm it latches smoothly. If it’s sticky, have the hinge or release checked rather than forcing it.
• When refuelling, insert the bowser nozzle fully to open both internal flaps, don’t “top off” once it clicks off.
• Filling from a jerry can? Use the factory plastic funnel supplied with the vehicle (usually stowed with the spare). It’s shaped to open the capless flaps properly.
• Avoid lubricants or sprays in the inlet. If the flap feels tight, get a technician to inspect the assembly.
• If the cluster shows “Check fuel fill inlet,” or there’s a fuel smell after filling, inspect for debris at the mouth of the inlet and ensure the fuel door shuts. Persistent messages or EVAP codes warrant inspection of the Easy Fuel insert or filler neck seals using Ford procedures.
• If the capless unit is damaged, technicians can service the Easy Fuel insert or replace the complete filler neck with the correct Mondeo CD391 part. Aftermarket “locking caps” are not compatible.

The end result is straightforward refuelling, fewer spills on the paint, reduced evaporative emissions, and less hassle for Aussie and Kiwi Mondeo owners—without ever touching a screw-on cap.

Popular questions

Does the 2016 Ford Mondeo have a fuel cap?
It doesn’t. This model uses Ford’s Easy Fuel capless system. The nozzle at the pump opens the internal flaps, then they reseal when the nozzle is withdrawn. This is detailed in the Mondeo Owner’s Manual for the 2016 model year.

How do you refuel from a jerry can with the capless system?
Use the Ford-supplied plastic funnel stored with the spare. Push it firmly into the filler to open the flaps, then pour from the can. When finished, remove the funnel, wipe it clean, and refit the fuel door. Don’t try to pour directly from a can without the funnel—the flaps won’t open properly.

What should be checked if “Check fuel fill inlet” appears?
Look for dirt or foreign objects around the filler mouth, confirm the fuel door closes cleanly, and make sure the pump nozzle was fully inserted during the last fill. If the message persists or there’s a fuel smell, a technician should inspect the Easy Fuel insert and seals and run EVAP leak diagnostics.