If the transmission control module fails will it cause service engine soon light to go on?

Yes, a transmission control module (TCM) failure can cause the service engine soon (SES) light to go on. The TCM is an electronic control unit that is responsible for managing the transmission system in a vehicle. It monitors various transmission components, such as shift solenoids, pressure sensors, and speed sensors, and uses this information to control the transmission's operation. If the TCM fails, it can affect the transmission's ability to shift gears properly, engage or disengage the torque converter, or maintain the correct fluid pressure, which can lead to the SES light being illuminated. Additionally, TCM failure can store diagnostic trouble codes (DTCs) in the vehicle's computer, which can be retrieved and analyzed by a qualified technician using a diagnostic scan tool.