If you drive a Ford and see a "Check Fuel Fill Inlet" warning on your dashboard, it can be confusing and even scary. A lot of drivers want to know right away if the problem is serious, if the car is safe to drive, or if it could hurt the engine.

This guide tells you what "check fuel fill inlet" means, why it shows up on some Ford models, how dangerous it is (or isn't), and what you should do next. This article has everything you need to know, whether you drive an F-150, Mustang, Explorer, Fusion, Escape, or F-350.

What does "Check Fuel Fill Inlet" mean?

The meaning of "check fuel fill inlet" is clear:

Ford cars don't use regular gas caps anymore. Instead, they use a system of sealed fuel inlet valves. The check fuel fill inlet alert goes off when the system doesn't seal right.

Common Ford Models Affected

• Check fuel fill inlet F150
• Check fuel fill inlet Ford Explorer
• Check fuel fill inlet Ford Fusion
• Check fuel fill inlet Ford Fusion 2012
• Check fuel fill inlet Mustang
• Check fuel fill inlet 2014 Mustang
• Check fuel fill inlet Ford Escape
• Ford F350 check fuel fill inlet door

The message itself does not mean your fuel door is broken — it refers to the internal valve, not the outer flap.

Is Check Fuel Fill Inlet Dangerous?

One of the most common questions is:

In most cases, no — it is not immediately dangerous.

• Fuel vapor leaks
• Failed emissions tests
• Reduced fuel efficiency
• A persistent check engine light

Is it okay to drive?

Yes, in most cases, checking the fuel fill inlet is safe to drive. Most of the time, the car will drive normally. That said, it's best to deal with the problem quickly to keep the EVAP system from having problems in the future.

What Makes the Check Fuel Fill Inlet Alert Go Off?

• Dirt or other stuff stuck in the fuel inlet valve
• Not enough fuel (the pump shuts off too soon)
• Filling the tank too much
• Broken spring on the inlet valve
• Problems with the EVAP system sensor

Sometimes, just filling up again correctly can get rid of the alert.

How to Reset the Check Fuel Fill Inlet

First, try this:

• Stop the engine
• Open the door to the gas tank
• Put the fuel nozzle all the way in
• Take it off slowly
• Close the door tightly
• Take a short drive

A diagnostic scan may be needed if the message stays.

When to Be Concerned

• The alert stays on for a few days
• It comes with a check engine light
• You can smell gas fumes
• The emissions test fails for the car

In these situations, a mechanic may need to look at or replace the fuel inlet assembly.