Well, that makes sense, considering the owner’s manual for my ’08 says you must drive to at least 16mph to reactivate the TPMS to turn the light off.

I can see someone standing in front of his car spinning his piped sensors around on a rope to achieve that, but that wouldn’t worth either.

 

Not sure if that is the right conclusion here...

TPMS is attached to the valve stem. The portion inside the wheel has a pressure guage sending information to onboard sensors. What would this have to do with the rotation of your wheel. The "On board" sensor recalibrates at 16mph - sure, makes sense. But the sensor contained in the wheel that is measuring the pressure is not equipped with an accelerometer to know the tire is rotating. So, placing these TPMS units in a pressurized vesssel does make sense.

There is something else at work here with the G - perhaps the sensors that are picking up the TPMS readings are outside the car and could not read them when in your car.

MY IS250 never indicataed a warning when my summers were in the trunk and back seat - only once removed and placed in the garage. Never removed the wheels off the G... she does not see winters.

 

I'm pretty sure there would be a pressure shift while the tire is rotating versus sitting still.

Think of a drag racer. When the tire is rotating, it tightens up and sits "taller". Perhaps (somehow) the TPS takes this into account. I'm not saying thats the answer LOL. But if it had something to do with that, it wouldn't surprise me.

 

That has more to do with the rotational forces on the tire itself than anything else. The pressure might change, but I can't imagine it being much.