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 ...

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 — ...

As great as cars can be for getting where you need to go as quickly as possible, they have some drawbacks. Most notable are ...

Whether it’s an extended road trip or a quick getaway, many Americans are looking forward to hitting the road this summer. But if the vehicle “Check Engine” light comes on, your adventure could come ...

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