My 2010 XF 3.0d, 65000m has displayed the following faults on the screen for the lsat 3 years :- Park Brake Fault, Gearbox Fault, DCS Not Avalable. Also, more recently :- Water in Fuel, DCF Full.
The car drives perfectly and although i have not sought a Jaguar main agents advice, diagnostic tests are clear. If you find an answer please report back as i think there are a lot of owners with the same problem.