911 cs4 991 pcm system version

[sleepersd]

I recently purchased 2015 991 CS4
After few weeks I started experiencing problems with PCM .PCM start rebooting randomly,every few minutes. I saw a lot of posts about this issue but they are all more than a year old.
Is there any new solution for this problem? Do you guys have any suggestions what I should try to do ,I’m running on
SYSTEM VERSION V4.75
PCM 3.1
What is the newest PCM VERSION for 991 models and what is the best way to update the version .
Another thing that is driving me crazy since day one is that every time I start the car I have to change sound source from tuner back to Bluetooth,is there any way to have the car recognize and to connect by itself to iPhone always when you start up the car ?
Last thing is there any safe to install Apple car play in 991 model?

Thank you

[juanbenae]

this is predominantly an air cooled forum, not many PCM gurus here. have you tried rennlist, which is more of a water pumper dedicated forum?

what is PCM?

[sleepersd]

Thanks for letting me know this