If you do have to resort to consorting with a dealer:

as far as I can tell, when they "reset" the TPMS system they "tell" it what PSI setting at each tire to expect. Am I wrong?

Anybody?

So make sure they do it right, as it is preset to warn at a 10% psi drop.
(Set for 36 psi rear and will alarm @ -10% (3.6psi drop=32.4 PSI).

While done with the tire @ 33 PSI and .6 PSI later:

Warning light.

Is this the way it works? Or am I full of crap?