Tire pressure sensor in 2008's

[blackhawk29]

My TPM is all over the place. since the cold weather it shows low pressure readings on all tires. The DIC just keeps showing low pressure warnings on all the tires. I of course have them inflated to proper levels. They should have filled the tires with nitrogen at the factory, or wrote a better program for the ecm to factor in cold weather changes. I just ignore it.