I have just bought a XF on a 67 plate with just 10k on the clock. As it was being delivered the TPMS system fault warning light came on, As the driver was only a few miles short of the 138 mile delivery destination I opted to take the car, the dealer would send a set of 4 new TPMS valves and pay to have them fitted by my local KwikFit, which I did today. All was well until I had driven 8 miles, but then the TPMS light came on again. How can I reset it? According to the vehicle status menu all I can find is two settings: TPMS light load or TPMS heavy load.