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 ...

The second iteration of on-board diagnostics, OBD II, has been required tech on all new cars sold in the U.S. since 1996. That means that anyone who uses or works on cars less than three decades old ...

Code readers are diagnostic tools that every car owner should consider owning. Having one of these is as important as carrying a spare tire or a fire extinguisher in the trunk. Back in the day, before ...