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 ...

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 ...

John Paul, AAA Northeast's Car Doctor, hears from a reader deciding between a vehicle code reader and a scan tool. The post Comparing code readers and scan tools appeared first on Boston.com.

The top end of the technology ladder is held by a scan tool. This car diagnostic tool plugs into the OBD-II port (“OBD” is an acronym for on-board diagnostics, and the “II” designates the second ...

Q: You have mentioned a scan tool that was not overly expensive but bordered on something a professional would use. What kind was it? When I look online, there are many to choose from. A: Innova ...

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 ...