Q: What does the “Check fuel fill inlet” warning mean in the message center?

asked by on December 15, 2015

What does the “Check fuel fill inlet” warning mean in the message center?

The “check fuel fill inlet” warning is an indication of an issue with the fuel cap, which covers the fuel fill inlet. Fuel caps are a vital part of the evaporative emissions (EVAP) system. If the fuel cap is damaged, or not affixed to the fuel fill inlet properly, this may lead to fuel leaks, decreased gas mileage, and/or more serious issues with the evaporative emissions (EVAP) system.

  • When the fuel cap is affixed securely to the fuel fill inlet, this creates a vacuum pressure seal. The vacuum pressure seal enables pressurized fuel to flow through the fuel system.

  • When the fuel fill inlet is sealed properly by the fuel cap, harmful pollutants and fumes are sealed inside the fuel tank. This is an important part of the evaporative emissions (EVAP) system, and doing so prevents these harmful pollutants and fumes from being emitted into the environment.

  • The fuel cap protects the composition of the fuel tank when it is secured to the fuel fill inlet properly. This prevents outside contaminants from being able to enter into the fuel tank through the fuel fill inlet.

The “check fuel fill inlet” warning may be an indication of the following:

  • The fuel cap is missing
  • The fuel cap is loose
  • The fuel cap is damaged
  • The fuel cap is screwed on too tightly
  • There is debris in the fuel fill inlet
  • There is a vacuum pressure leak
Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Losing gas when my car is going up a hill

In many cases, the issue you're describing is caused by either a small crack in the fuel cell, fuel lines connections, or a damaged fuel line itself. If the issue is towards the rear of the vehicle, and severe enough,...

Can hear fuel injection inside car

If you hear a humming noise, you could have a fuel pump issue. If you hear ticking, then it could be multiple things from a faulty fuel injector, to an engine issue. A diagnostic inspection of the noise from a...

cars ruined by fuel

Hello. It is possible that there is something that is defective in your fuel system. This could be a fuel screen or parts that would cause the fuel pump to malfunction. It is unusual for you to have problems with...

Related articles

Symptoms of a Bad or Failing Fuel Gauge Sender
If your fuel gauge behaves erratically or is stuck on full or empty, you may need to replace the fuel gauge sender.
How to Troubleshoot a Gas Cap Cover That Won't Open
Gas cap covers, or fuel doors, get stuck closed and won't open if there's a faulty internal spring or lever, lack of lubrication, or bent fuel door.
How to Tune and Adjust Your Carburetor
While all modern cars use computer-controlled fuel distribution systems, there are still many vehicles on the road that employ the traditional carbureted method of...