The world of car diagnostics has changed a lot over the last 50 years. Back in the '70s and earlier, a mechanic's most valuable diagnostic tools were usually their eyes and ears. You could figure out ...

We earn commissions from purchases you make using links in our articles. Learn more. If your car or truck’s check engine light is on, there’s a stumble when accelerating, or if the transmission just ...

Autoblog aims to feature only the best products and services. If you buy something via one of our links, we may earn a commission. The second iteration of on-board diagnostics, OBD II, has been ...