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?

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 early next year, 1996 and newer vehicles won’t have to pass the Illinois EPA’s treadmill emissions test that generates hundreds of damage claims annually. Instead of the dynamometer test, in ...

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 ...

CONCORD — Lawmakers have put the brakes on emissions testing. The House voted 222-102 Wednesday to pass a measure that would delay the on-board diagnostic (OBD) testing until May 2006. It also sets ...

️ 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, ...