Skip the auto shop - Our mechanics make house calls

Q: Gas cap warning light stays on

asked by on

My car's gas tank was replaced recently and 3 days later the 'Check Engine' light came on and stayed on. Plus, a gas cap sign is now showing. I tightened it and it seems secure. What does this mean?

A: I would take it back to the dealer that put...

I would take it back to the dealer that put the tank in and have them check their installation of the fuel tank. The lights should be off and no leaks detected with the new fuel tank. You may have a major vapor line leak and gas vapors are more flammable than liquid gas.

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・Save up to 30%

Get a quote

What others are asking

Q: Auto shutdown relay clicks and won't stop until negative cable is off

Hi, thanks for writing in. This may suggest a short of some kind causing the power to continue to be supplied to the relay. The starter relay is a small unit near the starter that directs power to the starter...

Q: Door not locking or unlocking

The actuator is the most likely cause of the problem; if the actuator is bad, it may prevent the door from locking, or unlocking. I recommend that you have a mechanic, such as one from YourMechanic, run an inspection to...

Q: Fuel cap indicator not working

Hi. I assume your Check Engine Light is on and you have an evaporative emissions (EVAP) code stored. Your cap may not be sealing well, even if it is on and tight. I would start by replacing the cap first...

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...
How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
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.