False TPMS readings?

winnre

Yesterday it was 37F in the morning. I drive about 200 feet when my TPMS sensor said I had a low tire. I changed cars for the day. When I got home I could see no low tire and all the pressures were fine.

Then this morning when i got in the car right away I had a low tire pressure warning again. I ignored it knowing the tires were fine and headed to work, planning to stop and check the tires now and then. After about 15 miles the sensor light went out. I checked when I got to work and at lunch and the pressure was still fine. It is 79F today.

Would the temperature make that much of a difference? I have the sport pack so maybe there is not that much air in the tires to start with since they are so tiny? Or maybe driving in the cold compresses the air THAT much? Has anyone else had this happen?