Q: What does "check fuel cap" mean?

asked by on

I'm not sure what I should be checking for exactly when the "check fuel light" comes on. Just that the gas cap is tight? Is there a risk of fuel leaking or other issues? And if the light stays on after I tighten it, do I need to talk to a mechanic?

Hi there, thanks for writing in.

If the "check fuel cap light" is on, then either the fuel cap is not tight enough, or the sensor to tell you the cap might be loose is having a problem. The sensor is part of the evaporative emissions system, which is monitored by the engine control module. It only detects if the fuel cap is loose and should not pose any other problems other than the light is on. If that light is illuminated and your gas cap is tight, then there may be a problem with the sensor or with the evaporative emissions system. Try removing and reinstalling the fuel cap, and see if the light goes away. If the light does not go out after this, remove the cap and check for any dirt or debris on the cap or tank opening and reinstalling the cap again. If that doesn’t make the light go out then you should have the problem inspected by a professional technician, such as one from YourMechanic.

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
  1. Home
  2. Questions
  3. What does "check fuel cap" mean?

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

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...