My TMP "light" was on, got new tires last spring. Had them address this as well.
The "light" was still on.... After a couple of weeks I put a piece of black tape over it

A couple of days ago, I've been reading the XF manual(again).

I then discovered that the "light" that was lit was....the telescoping steering wheel lock warning light!

Wow! What a dumb ****!

The TMP light has been out/working all along!

After your laugh...back to the topic.