2010 Secondary Air Pump Code P0492/P0491 with Custom Exhaust

AndyB

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City
Hilton head
State
SC
Country
United States
What I Drive
2010 S4
#1
Hi, Thanks in advance for an assist I have a P0492/P0491 (failing secondary air injection pump) code on my 2010 S4. Recent purchase and just love the car, very well maintained with 134K miles. Code has been on since I got Her a couple Weeks ago and prior owner mentioned it had been on since He bought it 1 Year ago...
I pulled the codes and figured it was the Secondary Air Pump, though you can clearly hear it run at start-up, not sure where to look next but after inspection of the car underneath figured out why the car sounded so nice, she has a Stainless Steel Borla exhaust system, front to back. I cleared the codes, and they popped up 2 Days later, at start-up the car idles then dips one or 2 times, second dip gets close to a stall, then the car corrects and idles/runs like a champ shortly after. Gather this code and idle issue has to do with the custom exhaust? Or even though the air pump is making noise could it be failing?
Anyway to remedy short of a sticker over the Check-Engine Light?
Thanks for any help!
Andy B
 

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