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

What does it mean if the Check Fuel Cap message is displayed?

A common misconception is that the only purpose of a fuel cap is for it to be a top for the fuel tank. It actually has many purposes and is a critical component of the evaporative emissions (EVAP) system. If...

Just bought car, sputtering and loss of power going up hills 1991 Dodge B250

Hey there, thanks for writing in about your Dodge B250. If the vehicle runs better when above half a tank, the pick up tube in the fuel tank may be broken or disconnected. Replacement does involve replacing the fuel pump....

I emptied my oil and it came out way to fine and with gas.

Hello. If there is a lot of fuel in the oil, then you either have an injector that is leaking too much fuel into the engine or you have a compression issue. Most of the time this is caused by...

Related articles

How Can I Keep My Fuel System Clean?
Proper Proper maintenance of the fuel system is crucial for consistent long-term performance of a vehicle. The most easily clogged parts of the fuel system are the fuel injectors themselves. There are a number of ways this can happen: ...
Symptoms of a Bad or Failing Fuel Rail Sensor
Common signs include the Check Engine Light coming on, the car not feeling right when running, and issues with starting the car.
How Can You Tell That Your Fuel Pump Isn’t Working?
The The fuel pump is responsible for getting fuel out of the gas tank and up to the engine. The pump itself is usually located inside the gas tank. There are a handful of symptoms to look out for that...