Skip the auto shop - Our mechanics make house calls

Q: My gas cap light keeps coming on. It won't click when I turn it, so I bought a new cap. New cap won't click closed either. What co

asked by on

My gas cap light came on. I checked it and it seemed like it wasn't clicking closed. I bought a new cap but it still won't click closed. I looked it up and it seems like the sensor is going off because there is no sealed pressure on the tank because the cap isn't clicking. Not sure what else could be wrong. Help? 馃槵

My car has 46820 miles.
My car has an automatic transmission.

If you need a gas cap, especially if you are trying to resolve what you believe might be a cap related fault, use an OEM (dealer supplied) cap. Using a genuine OEM cap of the design supplied when the car was built is the only way you can guarantee that a replacement cap (even if "new") is not still a, or "the", problem. Aftermarket caps are often not identical to the OEM caps. Once you have a genuine OEM cap, if the cap is not clicking once tightened, there could be a problem with the threads on the fuel filler neck or other filler neck defect that will have to be resolved. I recommend that you request a gas cap inspection/diagnostic. A certified Mechanic, dispatched by YourMechanic right to your location, would then get this resolved for you. If you have further questions or concerns, do not hesitate to re-contact YourMechanic as we are always here to help you.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  • Home
  • Questions
  • My gas cap light keeps coming on. It won't click when I turn it, so I bought a new cap. New cap won't click closed either. What co

Get an instant quote for your car

Our certified mechanics come to you 銉籅acked by 12-month, 12,000-mile guarantee銉籉air and transparent pricing

Get a quote

What others are asking

Q: Timing belt/water pump replacement

Hello, thanks for writing in about your 2002 Hyundai Elantra. It is possible that the second timing mark was used by a previous technician to indicate the proper location of the crank. It is also possible that you have the...

Q: Would a failing oxygen sensor cause lack of power and shifting problems?

As you may know, the oxygen sensors, which are part of your emission's system, read exhaust gases to determine whether or not the appropriate amount of oxygen is present in the exhaust. Based upon this reading, this information is relayed...

Q: Gas tank implodes/ won't fill.

Your fuel tank is going into a vacuum when the engine is running. The vacuum condition is causing the fuel tank to collapse and the gas cap is supposed to let in fresh air from the outside to keep the...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...