Several 2016 HD owners have noted that their dealers advised that the old diagnostic and scan tools had the option to change the threshold level at both locations as described in post #1 but when they updated their tools to be able to scan and diagnose the new models, they lost that functionality.
Some other owners noted that their dealer advised them that this particular query cannot be accessed at the module level due to encryption or loss of access to that part of the module's code.
Whichever it is I'll be interested to hear what you find out when your dealer tech tries to modify the psi threshold.
I hate to sound skeptical but, in my experience, sales does not know what techs can and can't do.