Seeing your vehicle's check-engine light come on can throw a wrench in your travel plans. It can also feel a little scary: Does it mean your ride is headed for the scrapyard? Or is there a simple fix?

Weekend wrenchers rejoice: there’s finally a CarPlay-compatible OBD scanner app available for iPhone users. It’s called OnTrack. For years we’ve been restricted to using a phone mount to diagnose cars ...

The automotive industry has a huge variety of OBD2 scanners that come in a wide range of price tags starting from less than $100 and going up as high as $10,000. This glut of options is probably the ...

Your check engine light can come on a host of reasons, ranging from a loose gas cap to a faulty engine component. If you see a light illuminated on your dashboard, you can use an OBD2 scanner to ...

“Helped me dx and solve a problem the first time I plugged it in.” Plugging a scanner into the OBD2 port under your steering wheel is one of the first steps a mechanic will take to diagnose customer ...

You've probably been there — you go in for a simple oil change, and suddenly the mechanic tells you your transmission needs replacing. Or your check engine light turns on, and what you thought would ...

Topdon makes a huge range of car computer tools, from simple $30 OBD2 scanners to full-featured diagnostic units (both Amazon links) worth more than three grand. The new Topdon One and One Lite are ...

This article was updated in November 2025 with new information. You know you’ve earned your DIY stripes when you can stay calm the moment something goes wrong. And with cars, that moment usually ...