DTC B123A-24: Left Front Turn Indicator - Signal stuck high: Action

WARNING: This page is about a different car, the 2018 Jaguar XF, 2017 Jaguar XF, and 2016 Jaguar XF. However, it is still accessible from the selected car via links, so may be relevant.

Refer to the relevant system wiring diagrams and check the front left turn signal indicator circuit for short circuit to ground, short circuit to power, open circuit, high resistance