Hi, Ive been getting an intermittent P0411 CEL code. "The PCM has determined that the flow detected in the secondary air injection system is incorrect for the current engine operating conditions" Ive searched and learned this is a problem with the secondary air pump, so my question is, is that pump nescessary to run the car, or could i just take it off all together?


I also have a loud creaking when i turn the steering wheel when it is warmer outside, any idea waht this could be?

and lastly, where is the fuel pump located on a B5 A4 quattro tip?

thanks

 

https://www.audiforums.com/m_822406/tm.htm

the fuel pump- http://www.audiworld.com/tech/eng81.shtml