Circuit Description
WARNING: This page is about a different variant/trim than selected.
Engine torque information is sent to the transmission control module (TCM) by the engine control module (ECM) through a communication network called the controller area network (CAN). Two circuits are used to communicate CAN data between the ECM and TCM. A fault in the CAN will not cause DTC P2637 to set by itself. If a CAN fault occurs, other DTCs will set before DTC P2637.
When the ECM sends the TCM an engine torque signal that is invalid, DTC P2637 will set. DTC P2637 is a type B DTC.