there could be many, please ask in here https://www.landyzone.co.uk/forum/range-rover.10/
Make sure you pick the right sub forum when starting a thread.
But give as many details as possible, because there could be loads of reasons Help is available.
Welcome to LandyZone,
I agree you need to post a full description of the issue in the Range Rover section. As I drive a petrol I can't really comment but there are many who can. Good luck.
Tricky.