Your car is basically a rolling computer network, and that little “check engine” light is the car begging you to read the ...

When the check-engine light snaps on, it is not a suggestion, it is your car’s way of saying something in the powertrain or emissions system needs attention. I see it as an early warning system that ...

Here are 2025's most popular questions and answers from The Journal's Car Doctor column, from rotating tires to oil changes.