Reduced Engine power code p 0120 even after TPS replacements.

What is your question?

I have replaced both sensors for the throttle body and throttle pedal but continue to get intermittent reduced power conditions and codes such as that above and a couple others which suggest the same problem. I frequently run a hundred miles or so without issue and then at other times will get the above fault back to back or within minutes of each other when I reset/clear the codes with my OBDII while still on the road. What the heck is up with that? Any guidance would be much appreciated.