Power Steering (G1905162): Operation: Notes
WARNING: This page is about a different car, the 2020 Jaguar XE and 2019 Jaguar XE. However, it is still accessible from the selected car via links, so may be relevant.
For the electric power steering system to provide assistance the engine must be running - with one exception - see: ASSISTANCE CHANGES DURING AUTO STOP/START FUNCTIONS, below.
If a fault occurs which affects control of the electric motor, the Power Steering Control Module (PSCM) disables the electric motor. The driver no longer benefits from power assisted steering, but incorrect control of the electric motor is prevented and the vehicle remains fully steerable, although with greater physical effort.