Hello, my name is Mark and I will try help you with this.
Do you have the 4 digit bypass code that came with the vehicle?
You should try the code in the drivers door lock to see if will then start
ihave tried that. it still doe;snt work. I can buy th e computer to check this is it worth 150 pounds as they say it is a common fault with these range rovers.
Try using the code 1515 to see if that works.