Ranger Mods

Hi all,
A week or so ago I had Bob Jane do a 5 wheel rotation and alignment.
They suggested fitting a valve base? in what was the spare so next time they could just break the bead and move the sensor without having to remove and swap the rubbers around.
Since then that sensor is not reading correctly.
I have an obd2 reader connected to my phone.
It seems to read the pressure at the start of the morning drive, then stays at that reading for the rest of the day, even when having multiple stops during the day.
The next morning the same thing happens again.
We are travelling through outback Qld and no Bob Janes around.
Any thoughts please?
Chris.

Probably an aftermarket faulty sensor. Replace it with a genuine and have it programmed in and see how it goes.