DTC P0605-41: Internal Control Module Read Only Memory (ROM) Error - General checksum failure: 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.

Using the Jaguar Land Rover approved diagnostic equipment, open Guided Diagnostics then select Powertrain - Transmission and Driveline - High or Low Range Selection
Using the Jaguar Land Rover approved diagnostic equipment, select the DTC-associated Guided Diagnostics to facilitate a TCCM EEPROM memory reset or software update, as appropriate. The Guided Diagnostics will subsequently test the system and report a DTC if a fault persists
If the fault persists, install a new transfer case control module and configure as a new module. Refer to the Transfer Case Control Module Replacement Application instructions in the relevant Diagnosis and Testing Section
Refer to: TRANSFER CASE .