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.

To convince the transmission control module that a working automatic was still installed and clear the fourteen-odd diagnostic codes, [Dean] put together a block of eight common automotive relays.

The transmission’s computer, the transmission control module (TCM), takes all of this into account to strategize the ideal shift and clutch pressure, so if any one input is missing, it won’t ...

More GM truck owners are reaching out to GM Authority stating that they've been waiting weeks and possibly even months for a fix, with no clear timeframe.

Owners will need to drop their Chevy, GMC or Caddy down to their local dealer who will upgrade the transmission control module software.

The module is covered for ten years/240,000 km, but Ford said that if necessary, it will replace the module at no charge for up to six months, even if the warranty has expired.

GM has issued a service update to address a problem related to the Transmission Control Module in certain 2020 and 2021 model-year C8 Corvette Stingray models.

2012 Audi A6 2013 Audi A6 2014 Audi A6 See More Service Bulletins Corrective action: Dealers will either flush the auto transmission fluid and/or replace the transmission control module.