It's not uncommon for the check engine light to turn on after a simple oil change or for it to turn on and off, only to suddenly stop for no apparent reason. Seeing a check engine light can be ...

and that will activate the check-engine light. However, note that if you tighten a loose cap, it will take several on-off driving cycles to turn off the light (but that might occur before you have ...

If you leave your fuel cap off or loose (even by half a turn) it can trigger an emissions code in your vehicle’s computer. This, in turn, will cause the computer to turn on your Check Engine light. So ...

If you have a check engine light on, a diagnostic tool is great for troubleshooting the problem. Here's what you need to know ...

Please turn off your engine while refueling. But is it really necessary, or just one of those old habits that stuck around? A ...

Whether it's an improperly closed door, or the dreaded check ... warning light is referred to as "the red jewel" on the car's dashboard. The manual advises the light should turn off once the ...