Could valve body tourquing have anything to do with these codes?Sounds like what @Rockabillyrat said about the valve being stuck in the valve body. I have never tried pulling one from a trans before, but I do know everything MUST be clean including the area your working in. from what I'm told the tiniest speck of dirt can reek havoc in there.
I would wait for him to instruct you on what to do and what your up against doing it. I'm sure he will have some detailed instructions and what to do and not to do here.
I will be pulling it out tomorrow as the weather isn’t cooperating today