Here is what INPA scanned . . .

2761 SEKUNDAERLUFSTYSTEM Bank 2
P0492 LUFTSYTEM Bank 2

I read that it could be a variety of things from O2 Sensor to Secondary Air Pump. The Service Engine Light has come on three times now. I know the dealer will just guess too and have me replace parts I do not need. Any thoughts here or may I ask for opinions and/or responses please.

I just do not know where to start here. Do I replace the O2 sensors or the secondary hose and valve? I am stuck and my brain has read quite a bit already. Any suggestions for a small time guy like me trying to learn and fix a problem.

 

If you have DIS, it should give you a more precise readout. Try to do that before you start changing parts, it could be anything. What are your symtoms?

 

DIS will give you the same error codes relating to the secondary air system. Check all hoses and so forth first. It's not going to detect if you have an air leak. It's not an issue that will affect anything. Unplug the secondary air system and clean contacts before plugging back in.
Do a diagnostic on your lambda sensors to rule those out.
You did not list what your car is. I have a brand new extra part laying here that may be of use to you.

 

Sorry, I have a 2004 545i. I will post pics of the senors reading. Ironic that two had negative readings. Excuse my naivity here but I will post them. Left the inages in my office.

 

read this post.. some good info and videos on here.... Member schpenxel post 48,, posted a good video on cleanning secondary air passages

Secondary Air Injection System Fault P0492 - Bimmerfest - BMW Forums