Tire pressure/leak/dirt between rim and tire

[cajun1le]

Have you tried dismounting the wheel and use a mixture of liquid dish soap and water to wet the entire rim and tire for leaks? The mixture doesn't have to be exact, basically all your doing is diluting the dish soap enough so that it has the viscosity of water to allow any air leaks to show up as miniature suds/foam. Make sure the tire is properly inflated and use the solution everywhere including:

-the entire tire surface (sidewalls, bead crevices, and tread surfaces)
-remove the valve cap and apply solution on the valve stem, valve and around the TPMS
-apply leak detection solution across the entire width the rim from bead to bead (to detect if the rim is cracked).

If it's leaking anywhere its either a sidewall crack (usually from age/low tire inflation), bead not sealing, puncture, valve stem/schrader valve, o-ring at TPMS valve stem or cracked rim.

[VTSummit]

With the low miles you have, it's probably not corrosion which I believe the TSB's address.
Any chance there's something in the tire? I pulled a staple out of a tire today- took forever to find.
They need to take it off the car, crank the pressure up to the max the tire is designed to take and spray with "bubble juice" that all dealers have.