P0491 and P0492 first and second bank secondary air injection code
 

I have a 2003 Audi A6 Quatro 3.0L 130,000 that just threw these codes. Any hints on where to start looking as to why?

Any recent damage or work done to the front end right side(passenger side)???

Vacuum lines going to Combination valves or the valves themselves, secondary air pump and/or hoses, power to the pump are some of the things to start with.