Yeah Kenchan... good point. After I saw your post I was able to verify with other gauges I have that the calibration is spot on. Haven't checked this in a while but I feel better now that I did and it's in spec.
I use a Milton pressure gauge ( picture shown ).
Still seems weird why at like 33 psi the TPMS kicked on. Once I filled it the light has been off ever since.
Ah, I move on.
