I am experiencing this as well - and right to F5's explanation. The weather has been in the 20s here the last few mornings. The TPM conistently goes off after 500 feet and shuts off after approximately two miles.
I surmise that as F5 stated, the TPM is sensing a low TP on cold mornings. Thus, once the friction of travel occurs, the wheels, tires, and subsequently air heats up to proper TP and *wala* the TPM alert goes back to sleep.
It is a bit disconcerting, but I am willing to deal with it.
Incidentally, does the spare really have a TPM in it? And what would be a good tire pressure to run in the winter to avoid this TPM alert if possible?
