This thread explains PCA pressure.
https://forum.hptuners.com/showthrea...eter-questions
"there is an option to cal the pressure tables as line pressure or as PCA pressures. ie. you can cal the tables to already take into account the characteristic offset & gain of the setup. This gain is 2.045 which explains why the pressures in the tables are double what you are seeing in the scanner.
the TCM divides the pressures by the gain value to get PCA pressure, which is what is displayed in the scanner. "