Is It Safe to Drive With the Gas Cap Light On? | YourMechanic Advice

Is It Safe to Drive With the Gas Cap Light On?

You have what sometimes seems like innumerable warning lights in your vehicle. Some of them alert you to very serious problems. Others, not so much. Some lights simply provide information, and your Gas Cap Light is one of those. When this light comes on, all you need to know that your gas cap is not present. Perhaps you have forgotten to screw it back on after fueling up, and you can consider this a helpful reminder that you should probably exit your vehicle and retrieve it off your trunk lid, or wherever else you might have left it.

So yes, you can drive safely with your Gas Cap Light on. Now, of course, you are wondering if you can drive safely without your gas cap. The short answer is yes. If you can drive with the Gas Cap Light on, you can drive without the gas cap. But what you need to know is:

  • Driving without your gas cap will not harm your engine.

  • Driving without your gas cap will not cause you to lose fuel. There is a flapper valve built into your car, and it will stop fuel from flowing out of your tank. The only danger here is if you were careless enough to lean over the fuel intake and provide an ignition source like a lit cigarette that could cause the escaping fumes to ignite.

  • Driving without your gas cap will not deliver harmful fumes into your passenger cabin.

The only real issue here is not safety-related – it is simply that until you replace your missing gas cap, you are going to have to live with a lit-up Gas Cap Light. Once you replace the gas cap, the light should go out. Sometimes, however, the system needs time to reset, so you may need to drive for a while before the light finally goes out. If it has not gone out within, say, a hundred miles, there could be other problems, and you should visit a mechanic to have your system scanned and the problem corrected. At YourMechanic, we can replace your gas cap for you, and also diagnose any problems that may be resulting in your Gas Cap Light remaining on even after the cap has been replaced.


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Travis

12 years of experience
425 reviews
Travis
12 years of experience
Volkswagen Beetle - Warning Light is on - Stillwater, Minnesota
Unbenoest to me when you change a battery on a 18 yr. old car you also need more than a code reader to reset the new battery.
Audi A8 Quattro - Warning Light is on Inspection - Minneapolis, Minnesota
Very helpful and very knowledgeable will be using this service again thank you Travis for everything trumbs up

Nicholas

10 years of experience
361 reviews
Nicholas
10 years of experience
Chrysler 300 - Warning Light is on - Durham, North Carolina
Excellent diagnostician. Knowledgeable and caring. Created a desire for him specifically, to do the job. Hope we get him every time!
Honda Accord - Warning Light is on - Garner, North Carolina
I was very happy with Nicholas and his knowledge and expertise about diagnosing the issues with my car. He is honest, reliable and professional. He is now my Mechanic that I will call on for all my car's needs.I will also recommend him to my friends whom have been taken advantage of by other car shops as I have been, and are looking for someone honest , that will not take advantage of them Thank you so much Nicholas for resolving my issue with my car. I feel relieved and happy with the outcome

Robert

15 years of experience
24 reviews
Robert
15 years of experience
Chrysler 300 - Warning Light is on - Maricopa, Arizona
Very professional, knowledgeable. Explain everything in great detail. Will definitely use Robert again.

Arturo

26 years of experience
183 reviews
Arturo
26 years of experience
Volvo XC90 - Warning Light is on - El Cajon, California
Arturo was very professional and friendly. Diagnosed my problem immediately, and I feel confident the service will be to my satisfaction when my radiator arrives for installation.

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