Posts Tagged: TCM

U0101 code definition, most common causes and troubleshooting

Learn what U0101 code Lost Communication with TCM means and the most common causes The U0101 code is defined as: Lost Communication with TCM. The code refers to a data communication problem between the transmission control module and other control modules in the vehicle. The TCM is an electronic module responsible for controlling the automatic transmission’s operation, including gear shifts, torque converter lockup, and shift solenoid operation. When the U0101 code is stored, it means that the TCM is unable to communicate with other modules over the vehicle’s communication network, … Read More