Skip the auto shop - Our mechanics make house calls

Q: The Check Fuel Cap light is on.

asked by on

Recently my check fuel cap light has come on and I have stopped a couple times and tightened it like normal until I heard it click a few times. It seems fine, might just be a sensor or it possibly really is loose and I need to replace it. Any way to tell? Thank you

My car has 67000 miles.
My car has an automatic transmission.

In order to find out what is causing the leak to be detected the fuel vapor system and cap will need to be smoke tested to see where the leak is. The most common is the seal on the fuel cap leaks. You can try and replace the cap first and then if the signal keeps coming on then have the smoke test done.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
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. The Check Fuel Cap light is on.

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

Q: I have a 2007 Suzuki XL7, it is constantly beeping and will not stop. I have checked everything and can't figure it out.

Hi there. In most cases, the beeping sound is created when one of two different systems creates an alert; a seat belt warning or a door is ajar. It is common for a system sensor to be damaged, which will...

Q: Electical problems. My a/c, cooling fan, and blinkers all quit working after I fiddled with my taillights.

Hi there. Check all of the grounds to the vehicle and make sure that they are all tight and clean. There could be a loose ground wire from the chassis to the frame causing the power loss to the air...

Q: Nissan Rogue doesn't have enough power when reversing uphill

The manufacturer states to not touch the brake while trying to push the accelerator. The computer will limit the engine throttle and you will see it as lack of power. Hover your foot over the brake, but do not touch...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.