Dtc P0410 came up after replacement of air pump?

2001 chevy blazer 4.3 vortec. I recently replaced the air pump and the new hose assembly stated in the technical service bulletin in response of the p0410 trouble code. 2 weeks later it shows up again. It shows 'p0410' and 'p0410' pending. what the hell is going on???? When I start the car, I hear the new hose vacuum sucking in air and shuts off after a few minutes. So it is working as it should. Why the hell are the these codes popping up if the pump is working!???!??? I'm really pissed off right now. can someone please help me?