[se88GGnka]

It has to do with pushing the resistance too high so that the temperature reports too low.

As a side note, an extra reason to not push the resistance too high is that below 70C the fast idle seems to kick in (at least on my 2012 EX-L). Here is an RPM vs coolant temperature graph I made for my 2012 EX-L) right after I installed S-VCM about 18 months ago. So there may be other fuel ratio implications with a resistor high enough to correspond to a reported temperature below 70C