Skip the auto shop - Our mechanics make house calls

Q: light smell of gas - 2016 Hyundai Elantra

asked by on

a couple of separate times I noticed a smell of gas from outside near the cap when car is idle, no smell coming from the front hood and no noticeable leakage or dripping whatsoever, smell can only be smelled from outside, it's light and and usually fades shortly after turning off. I have the a/c on most of the time for what its worth and it doesn't bring any odor inside.
My car has an automatic transmission.

Hi. It sounds like you are getting a gas vapor odor from a fuel tank venting system. The system is supposed to store the fumes in a carbon canister, and if excessive pressure builds up, this will vent to this canister. You should have the system checked for leaks of vapor.

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!

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 screw in my front tire. Can I park on it tonight before going to the tire shop ASAP tomorrow morning!

What you should do is spray the screw with some soapy water to see if you see any air bubbles indicating a leak. If you do not see a leak then try and move the screw side to side to...

Q: Why does my truck have gas pouring out near the tank when started up?

Good question. I will go through a few steps with you to try to save you a little money and hopefully find the problem. Get under your truck near the fuel tank. Look for the lines that are...

Q: The car starts but engine goes off when you try to accelerate

This may be a sign of a faulty MAP sensor as the vehicle responds adversely to a load put on the motor (i.e. putting it in gear or engaging the brakes). The Manifold Absolute Pressure (MAP) sensor senses engine load...

Related articles

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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.