DTC U0300-56: Internal Control Module Software Incompatibility - Invalid/incomplete configuration: Action

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 Land Rover Range Rover, 2017 Land Rover Range Rover, 2016 Land Rover Range Rover, 2015 Land Rover Range Rover, and 2014 Land Rover Range Rover. However, it is still accessible from the selected car via links, so may be relevant.

Check for related DTCs stored in other modules. Check that the correct central junction box is installed to the vehicle. Using the manufacturer approved diagnostic system check and install latest relevant level of software to the central junction box
Check that the correct power steering control module is installed to the vehicle. Using the manufacturer approved diagnostic system check and install latest relevant level of software to the power steering control module