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

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 ...

(iSeeCars) — A vehicle’s check engine light can turn any car ride into a harrowing experience. As soon as the check engine light illuminates, it’s hard not to hear the cha-ching sound of a cash ...

We may receive a commission on purchases made from links. The check engine light is one of those dashboard warning lights drivers dread to see suddenly come on in the middle of driving. First-time car ...

A vehicle’s Check Engine light can turn any car ride into a harrowing experience. As soon as the check engine light illuminates, it’s hard not to hear the cha-ching sound of a cash register right ...

When your vehicle's check engine light (CEL) comes on, it's often a sign that something needs attention. But with over 20,000 parts working together in your car — many important for normal operation — ...