These symbols, often called "idiot lights," are aimed at being easy to understand. But for many drivers, young and old alike, it's not that easy.

Side gapping your car's spark plugs could result in some modest performance gains. Here's what it means, how to do it, and ...

Diesel engines can technically run backwards, though there's very little (if any) practical applications for this, especially ...

If you own a Cummins truck built after 2018, you're quite limited when it comes to what you can do via the ODB port. That's ...