Skip the auto shop - Our mechanics make house calls

Q: Engine light came on and the gas cap is stuck

asked by on

A week ago after filling my gas tank, I drove my car a while and then went on vacation. Upon returning back home, my engine light came on. When I called a car service to make an appointment, I was asked why I was bringing it in and I explained the engine light. She asked if it had come on after filling my tank. She told me to tighten the fuel cap. Before tightening it, I tried to open it and the cap wouldn’t come off - totally stuck! Can you tell me what to do to get the gas cap open?

A: Hello. Your particular vehicle has what is ...

Hello. Your particular vehicle has what is known as the smart pin which will lock the gas when the vehicle itself is locked. If you unlock the vehicle with the key fob, the pin should disengage and you will be able to turn the gas cap. If it does not work when you unlock the door, you may have an issue with the smart pin itself.

If that is the case I suggest having a certified technician diagnose the issue with your gas cap and check the smart pin system in particular to see if there are any underlying issues.

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: Car is low on oil and trying to see which kind is needed for Porsche Panamera hybrid s 2014

You should only use 0w30 or 5w30 full synthetic oil that is authorized by Porsche.

Q: Diagnostic code P0721

Hi....the best thing to do is request a diagnostic based on the trouble code, P0721, that you have in hand. Resolve that first as the fault behind the trouble code may account for the shift difficulty you are having. The...

Q: Engine misfiring

On a modern car such as yours, the Check Engine Light should come on for a misfire. There is a technical service bulletin (TSB) # 11-007 which states the front engine mount can cause vibration and knocking from the engine...

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 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...
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.