MikeSmith3

Dave thanks for that. I will check behind the trim in the boot for any signs of water ingress shortly.

I have a Jaguar XF Portfolio March 2015 2.2d; after 9 years I still love it and hope to keep it for many years to come but my current issue is driving me potty. In heavy rain, after an hour or so of driving, I get a loud audible alarm and a message saying "Parking Aid Unavailable". At this point rear camera and front/rear sensors no longer work. They resume working after a dry spell. So I am thinking a water related issue. I took it to a Jaguar dealer but Sod's Law it was a dry day and the fault was not present although they did find two faults using their diagnostic tool. These did not allow them to identify the actual fault. I have a iCarsoft CR Pro tool and that (when the fault is actually present) gives me the same two errors as per the image below. As these two faults are front and rear sensors power circuit I am thinking water must be getting in to something common to both modules. My questions are: (1) Is my logic sound? (2) If so what is the common cable/connector that water could be getting in and where should I look? I have tried listening to the individual sensors but can't hear or feel anything (some say you should be able to hear the sensor when its active). I am really struggling to find any useful steers in where to look for water ingress as every model/year of XF seems to swap things around. I can do basic mechanic-ing and can use a multimeter. I would appreciate any help at all please.