Why it matters: Ignoring a check engine light can turn minor issues into costly repairs. Early, accurate diagnosis prevents damage and downtime. Tools you need: An OBD-II scanner, access to repair ...

When the check engine light comes on in a vehicle, it’s indicating that there is some issue with the car that should be checked out. It could be something minor, such as the gas cap not being screwed ...

The check engine light has always been a bit of a gamble. Sometimes it’s a loose gas cap. Other times, it’s a four-figure ...