P0491 and P0492 first and second bank secondary air injection code

Zuds41 · 07-18-2011, 12:44 PM

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?

Philhawtin · 07-18-2011, 04:45 PM

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

tester123 · 07-23-2011, 12:20 AM

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.

07-23-2011, 12:20 AM	#3
tester123 AudiWorld Member Garage is empty, add now Join Date: Oct 2009 Posts: 158	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. __________________ 01 Pearl White A6 4.2 Quattro Sport, cold, everything except Nav. TEMPORARILY PISSED OFF WITH ITS FUEL BANKS LEAN ISSUES...

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07-18-2011, 04:45 PM	#2
Philhawtin AudiWorld Member Garage is empty, add now Join Date: Oct 2010 Posts: 173	Any recent damage or work done to the front end right side(passenger side)???