When my MBP (Retina, 13", Early 2015, identifier MacBookPro12,1) is under load, could either be CPU load or "bus-load", ie wifi, usb, webcam etc the
CPU System Agent Core-sensor shows a very high temperature. The SMC-key is either
TC0F (ie Tango Charlie Zero Echo / Foxtrot). With very high temperature I mean 90C+, and I start to get bus errors here.
I believe this is either due to faulty SMC cooling "instructions" or bad application of coolant paste. I'm leaning towards bad application of coolant paste.
Is there any way I could easily check this? I guess I would void warranty by actually opening the MBP?
If you want to test your temperatures compared to mine:
-- At first, get homebrew, see instructions at http://brew.sh -- after installing run > brew cask install istat-menus -- thereafter -- scan for all sensors > istats -scan -- add the two which go high for me to default set > istats add TC0E > istats add TC0F -- check default + added sensors > istats