DTC B1D35-23: Hazard Switch - Signal stuck low: 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.

NOTE: This DTC may be induced by the driver operating the hazard warning lamp switch for longer than 60 seconds.

Refer to the appropriate system wiring diagrams and check the hazard warning lamp switch circuit for short circuit to ground. Repair the wiring harness or install a new hazard warning lamp switch as necessary
Check the operation of the hazard warning lamp switch. Install a new hazard warning lamp switch as necessary