Skip the auto shop - Our mechanics make house calls

Q: Gas tank leaks when filled up.

asked by on

My gas tank leaks when I fill it up.

Hello, A leaking gas tank should be addressed sooner than later, it is not only a hazard to yourself but also to the environment. Seeing that your car is an older model, it’s probably safe to assume it’s made of metal. The most likely cause of the leak would be the seal that is used on the fuel level sensor and or the seal for the fuel pump. My recommendation would be to drive the vehicle till it’s less than a quarter tank and then enlist the aid of a mechanic to help find the leak.

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: At idle, on an intermittent basis, the rpm repeatedly surges and returns to normal

There a few things that can cause this situation on your car. The most common have to do with the throttle body and the idle air control system. The throttle body is the where your your throttle valve is...

Q: Rain water coming into car

The most common cause of water leakages into the vehicle are openings in windshield seals and window seals. These are common things to have replaced as the deteriorate due to the sun and age. A qualified technician, like one from...

Q: During rain, dashboard lights & radio fade out - 1999 BMW 332is

Probably one or more electrical connections are getting wet when it rains. The wheel speed sensor for example is at wheel level (inside the wheel arch), and catches all sort of road spray. Once you find the problem connectors, spray...

Related articles

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...
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.