Hello,
Ive noticed that the check tire pressure alert has popped up again for the third time on my 2007 XKR, ive looked over the tire(without dismounting it), and have had it refilled to the proper PSI twice, and have not seen any indication of a leak or corrotion from the tire or wheel. Tomorrow ill also be taking it to Discount Tire to get the valve stem checked. However, ive recently had an issue with the touchscreen and potentially the battery as well, with the touchscreen stuck on the Jaguar logo screen and refusing to change off. I was wondering if the two issues could be related, or if the issues with the TPMS is seperate.

 

without proper voltage and current available, a number of modules cannot be activated nor operate correctly.
to add complexity, the tpms components in the tire are also charged by thier own internal battery.
Batteries have a shelf life.

 

The sensors have batteries which don't last forever, also antennas in each wheel well should be checked and finally the front harness is known to have issues with cuts from the bumper reinforcements.

 

Check your primary battery. If it reads less than 12.6V at the battery with the car shut down replace it. If you are replacing it make sure your new battery is fully charged when installed. Most auto part stores will check your battery for you. Our cars tend to be very persnickety when it comes to batteries The sign(s) of tired batteries a weird things happening with the electrical system. You may be having early onset battery issues.