What would cause all gauges in the dashboard cluster to stop working and the transmission to go into limp home mode?

The simultaneous failure of all gauges in the dashboard cluster, along with the transmission entering limp home mode, could be caused by a malfunctioning vehicle control module (VCM) or a failure in the power supply to the dashboard. Additionally, issues such as a blown fuse, damaged wiring, or a faulty sensor can disrupt communication between the engine management system and the dashboard. These problems typically trigger safety protocols, leading the transmission to limit performance to prevent further damage.