Exact same problem here. This is the third season I'm running my winter wheel and tire set, and the TPMS has worked fine the other seasons. This year, they went on, and the TPM Malfunction light came on, and nothing I did could get it to go past 49% after resetting and starting to drive. Brought it to my tire shop, they scanned all the TPMs and found two of them to be dead. Brought it to the dealer and got them replaced, and problem solved.
So odd
