There have been a few reports of sensor diodes getting stuck at idle and not going any lower but all of them go higher once you apply full load. Intel never designed these sensors to report idle temperatures. They designed and individually calibrate each one to trigger thermal throttling as the DTS approaches a value of zero and there isn't one report yet of that not happening.

The only problem with these sensors is that a programmer or two didn't read the Intel documentation and is using the DTS for a purpose that they were not designed for.

I've yet to see one single report of a new E8x00 processor over heating and melting because the DTS was faulty and thermal throttling and shut down wasn't triggered. We need to put this problem in the proper context.