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 ...

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 ...

That sinking feeling when your check engine light flickers on doesn’t have to mean an expensive diagnostic fee at the shop. Your smartphone already handles banking, navigation, and ordering food-why ...

Almost all cars made after 1996 have an OBD2 diagnostic port for plugging into and reading trouble codes when a “check engine” light comes on. But some vehicles, particularly German ones made after ...