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?

We may receive a commission on purchases made from links. The OBD acronym stands for on-board diagnostics, a system built into modern vehicles that monitors the performance of the engine and other ...

Add Yahoo as a preferred source to see more of our stories on Google. Since the mandate of the OBD-II port in 1996, auto mechanics have accessed vital information about your vehicle by tapping into ...

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 ...