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?

The “check engine” light is the most annoying orange icon in America. Half the time the car feels fine, and the other half ...

Recent articles and editorials have incorrectly implied that the new On Board Diagnostics (OBD) emissions testing program was optional for the state to implement, when in fact it is a mandatory ...

Starting Monday, the Illinois emissions test for 1996 and newer vehicles will be an electronic reading of the onboard diagnostics system (or OBD II) instead of a treadmill test. The OBD II test will ...

️ Editor's note: This product category requires new testing about once a year. We'll update this article with the most recent information when it's available. Modern cars are technological marvels, ...