Hi Mike
Sorry I can't answer your question directly, but I had a 2012 Sportbrake from 2014 until a year ago. When I came to buy it, it had exactly the same fault, but the dealer had it fixed before I took delivery. Sounds like either a huge coincidence or it is a known issue. Mine simultaneously had a fault with the self levelling rear suspension not working. From memory I was told the issue was electric/electronics. Neither reoccurred while I owned it.
I've had a few Jags over the years (still have two) and have always got answers / help from the two forums, that both have model specific forums. Suggest you try these:
www.jaguarforums.com (the UK based one) or
www.jaguarforum.com (the USA based one)
I had the 2.2 diesel, used it for commuting as well as towing the Dolomite racecar all around the country. Excellent car all round. Sorry to see it go.
Geoff