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 ...

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 ...