Autoblog may receive a share from purchases made via links on this page. Pricing and availability are subject to change. Seeing your check engine light pop up on your dashboard is never a good feeling ...

Modern cars generate mountains of diagnostic data, and choosing the right OBD-II scanner can make the difference between guesswork and real fixes.

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?