Did your vehicle's check-engine light just pop on? An OBD-II scanner can provide some direction. We tested a handful to find ...

Code readers, or car scanners, are a great tool for those looking to get information from their vehicles quickly and conveniently.

Had we possessed a scanner, we could have replaced the part ourselves and dodged the painful tow bill. Humiliated and broke, we vowed never again, and the search for a good code scanner was on.