Today's transmissions depend on computers as much as mechanical components. The Transmission Control Module, often called the TCM, uses information from sensors and other vehicle systems to help determine when and how the transmission shifts. When something goes wrong, you may experience erratic shifting, warning lights, limited operation or other drivability problems.
The important thing is not to assume that a transmission computer or TCM needs replacement simply because a trouble code points in that direction. The problem may involve a sensor, wiring, communication between modules or another part of the transmission system. Certified Transmission in Bellevue can diagnose electronic transmission problems and determine what is actually causing the symptoms before recommending a repair.