Did you ever get this figured out? I'm having the same issue as of yesterday I disconnected/reconnected the battery then used bimmercode to toggle tpms setting from showing pressure to pressure and temps to reset the ecu/module and see if that would fix the issue for now.
I never really figured it out. The TMPS will work for a while then drop and come back again, then drop and be out for a minute then come back. Not really sure why but they mostly work and started only dropping once in a while
I disconnected/reconnected the battery then used bimmercode to toggle tpms setting from showing pressure to pressure and temps to reset the ecu/module and see if that would fix the issue for now.
