Temperature sensors TH0R, TH0F

Hi

My Mbp 13 2015 is constantly rebooting with no Crash Reports in the Console. And has trouble booting up again - it takes 2-7 reboots to boot macOS. And after cooling down for a while it boots normally.

SSD health is good.

I've downloaded the Hot app (https://github.com/macmade/Hot) to check temperature sensors.

Two sensors (TH0R, TH0F) consistently show quite high temperature - 80-98°C. I searched google for a description of them, but found nothing.

Can you tell what they relate to?

Thanks!