Transmission Control Module (TCM) faults are not unknown on these early Mazda 3s. Symptoms usually involve erratic shifting, a failure to select gear at all and having the car go into limp-home mode.

Having a basic understanding of automotive acronyms is important. Some, like ABS (Anti-lock Braking System) and DOHC (Dual Over Head Camshafts), represent commonly advertised automotive features, ...

General Motors has issued a service update to address an issue related to the transmission control module (TCM) in certain examples of the 2020 model year Chevy Silverado HD and GMC Sierra HD pickup ...