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

You can purchase any global scan tool — often called a code reader — at most automotive parts stores or online.

Already an affordable option, right now you can save over $25 on this diagnostic code reader from trusted brand Ancel.

The scanner you buy should depend on which cars you plan to use it on most often. Some code readers are designed to work best with certain brands or even certain cars.

Which brings up the question, just because you can buy a cheap code reader and scan your own car, should you? The answer is both yes and no.

The hand-held Equus 3100 OBD-II code reader is versatile and easy to use. Just plug it into the diagnostic port, hit the link key, and wait for the codes to flow. The owner's manual has more than ...