cel after i masked a dtc

I just flashed my ecu with mazdaedit. I masked the cel for the mid pipe, and another the air pump. P0420 I think it was of the top of my head.....

Any way. Now I'm getting a p2259. Is the only point of this solenoid Air pump operation? If so should I masked this one as well? My air pump is removed so if so it has no purpose.