you can delete the error code, but it will turn on again.
This happened to me after I went to stage 2. It is a really stupid error - all its telling you is it either can't put clean air in the exhaust flow, or it can't stop (valve stuck open or stuck closed). In 2005, the car didn't even have the secondary air pump.
I have no idea what I did to fix it.... I took the IC back off, and really made sure every hose was connected tight. I think what happened was when I was messing around with the IC, I knocked the secondary air system loose a little bit. I didn't see any sign of a bad connection, but I just pushed on all hoses and electrical clamps hard. When I buttoned it all back up, the light never came on again. You have 2 valves, the real PITA of the error code is it doesn't tell you which one is stuck. There is one underneath the pump itself, and another one over by the turbo.
This system really shouldn't fail - I have to believe you just have a loose connection somewhere.