DTC P0604-44: Internal Control Module Random Access Memory (RAM) Error - Data memory failure: Action

WARNING: This page is about a different car, the 2016 Land Rover LR4, 2015 Land Rover LR4, and 2014 Land Rover LR4. However, it is still accessible from the selected car via links, so may be relevant.

Using the manufacturer approved diagnostic system, clear the DTCs and retest. If the fault persists, install a new transmission control switch