I recently purchased a used 2010 range rover supercharged and when i got it, the TPMS had an issue with the right rear tire. I brought it back to the dealer (not a Land Rover Dealer) and when it came back, instead of fixing the problem, i have the following message on my dash when i start the vehicle. "Tyre Pressure Monitoring not available". I had all the sensors tested by a tire shop and they all work. does anyone know how to get my TPMS back on line? i have made several long trips with it since, so recalibration is not an issue.