If your car or truck’s check engine light is on, there’s a stumble when accelerating, or if the transmission just isn’t ...

Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? The check engine light by its nature is vague, just a general indication that ...

Q: I am shopping for a used car. What do you think about bringing along a computer scan tool to test the car before buying it? Do you think the dealer or private seller would mind? A: I think scanning ...

If you've been involved in automotive repair for a while, you probably know that modern vehicles use onboard diagnostic (OBD) systems to help notify us when there's a problem. The OBD system works ...