Hi I have a Citroen jumper 05 campervan. When I open my camper with the fob on the key and get in and start it that’s all perfect but after about 5 minutes the imobiliser light comes on and stay on but maybe flash a couple of times when I’m driving. It has never left me down or stoped going. I have it checked by diagnostic 2 or 3 times but nothing showed up only a few large bills. Has anyone else had or seen this problem before. I would be grateful to any one could help me out or is it double jobing for some other problem. Thanks