DTC B12F3-15: Secondary Tailgate Release - Circuit short to battery or open: 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.

Refer to the appropriate system wiring diagrams and check the lower tailgate latch release circuit for short circuit to power, open circuit, high resistance. Repair the wiring harness or install a new lower tailgate latch as necessary