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 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 ...

As great as cars can be for getting where you need to go as quickly as possible, they have some drawbacks. Most notable are the repairs that tend to come along with them, which can be every bit as ...

Long story short is that my check engine light came on last Thursday. It was on until today when I noticed that it finally turned off. I have an appointment to take it in on Wednesday to get it ...

You just know it’s going to be a bad day when the “check engine” light on your car’s dashboard—which usually looks like the profile of a vehicle’s engine—stays on after you’ve started it. That usually ...

The costs of buying a new or used car have climbed in recent years, and so has the average repair bill. If a vehicle purchase or major repair isn’t in the cards (or budget), maintaining the health of ...