PC shutdowns. Incorrect motherboard temp readings

I'm having an issue with my PC, it keeps shutting down without warning. It will not turn back on before power connections is unplugged. It also happens from BIOS.

I installed open hardware monitor and could see the temps for one of the motherboard sensors jumps like crazy. It's cleary an incorrect reading. I assume this is why it's shutting down and not because of a faulty PSU. Any advice?

open hardware monitor CPU temp readings

Seems like a bad sensor on the motherboard.

You may either try to find some means of turning it off and making it be ignored by the BIOS (not recommended), or have the motherboard repaired by a professional (recommended).

You may also look on the website of the motherboard's manufacturer for new drivers, especially for the BIOS and the Chipset, before having the computer repaired.