Cars Is the gas cap causing my car’s warning lights to go on? John Paul, AAA Northeast's Car Doctor, answers a question from a reader with concerns about persistent warning lights.

While it might seem like a straightforward warning light to fix, seeing "Check Fuel Cap" on your dashboard could be a sign of something far more serious.

The warning sticker reads: "Do NOT get back in your vehicle while refueling. Sliding across the seat can create a static ...

Transportation-related greenhouse gas emissions account for 28% of US GHG emissions. EVs are such an important part of the US energy future because they are assumed to replace gas-powered cars.

Ford is rolling out its new 2009 lineup, and most models are getting a gas-cap-less tank. Ford calls this “EasyFuel,” not to be confused with “FlexFuel,” which means the car can run on E85.

I took my car in to the shop because the "check engine" light was on and found out this was simply due to my gas cap being loose. Why would that set off the warning light? – Louis in Duncan, B.C ...

Once the cap itself has been eliminated as the reason for a persistent "check gas cap," warning light, it's probably time to schedule an appointment with your mechanic.