If you're driving a rental or friend's car, there's often a moment of panic when you don't know which side the gas tank is on ...

One of the most confusing aspects of refueling, other than some new cars not having gas caps at all, is the inconsistency of the fuel door placement. They are either on the left or right side of the ...

The gas cap is one part of your vehicle that we bet you don’t give much thought to in spite of how often you use it. The thing is, a gas cap does a lot more than simply close off your vehicle’s filler ...

In a recent column, you talked about how a vehicle’s emissions system monitors itself for leaks. And that if a gas cap is loose and lets vapors escape, that will turn on the check engine light. Well, ...

What happens if my gas cap is left off? Why does it cause the check engine light to come on? Have I done some damage to the engine? These are very common questions, and luckily there’s an easy fix and ...

Most of us grew up with gas caps. Getting your driver's license and learning how to pump gas is a rite of passage for many in the U.S. — and a big part of that is twisting off the gas cap or at least ...

Forgetting which side of the car your fuel tank is on can be one of the most embarrassing automotive faux pas you can make. Making it worse, it’s a mistake you have to stew in, blushing as everyone ...

Q: I own a 2009 Toyota RAV4 with 97,000 miles. I have had issues with the check engine, VSC and 4WD lights coming on at the same time. I replaced the gas cap with an aftermarket cap, and when that ...