I recently replaced my saip and combi valve due to a p0411 code. Just a few days later I am showing this code again. The saip is working but when I feel the hose that goes into the air box it feels as if it is blowing air out. If I recall correctly it is supposed to sucking air in. I have to pass emissions in a month so I'm trying to get this resolved. Anybody know what could be causing this?
Take off the hoses to the pump and activate the pump. Then you will know if it is blowing properly in the proper direction. If the combo valve is not opening, the pump will run but has nowhere to pump.