Mac Mini TAOP--124 Hardware Test
It's not likely related your SATA drive because (besides it being specifically referenced to unencoded) decoding that error code tells us that it's the Ambient Temp Sensor.


4SNES = System Error
T = Temperature
A = Ambient


If it had anything to do with the drive, you would see an "H" in the code - like THxx)

This is something that you will need to replace.