2000 Audi A6 Quattro Avant 2.8L V6

Failed Ontario Drive Clean Test

DTC codes are

P0441

P0140
P1114
P1118
P1411
P1423

Seems I need replacement Purge Valve and Oxygen Sensor(s) however I do not know (being somewhat of a noob) exactly which O2 Sensor(s) to get. Can that be deduced from the DTC codes?

Seems that replacing the Purge Valve myself is easy enough - but the O2 sensors look really tricky and in need of special tools. Am I better off taking that to a mechanic?

Thanks for any help you can give

 

Looks like bank 1 (passenger...I think), sensor 2 (post-cat) is at fault. It would be helpful to have access to VAGCOM to determine voltage at that O2 sensor to get a better sense at what's going on. I suppose you could try swapping them and see if the DTC changes. You're going to need a 17mm open end box wrench when swapping them out.

Your last two codes 1411 and 1423 point to the secondary air injection system. Again, VAGCOM could help in this instance by allowing you to perform an output test easily. I would begin by ensuring the tubing going between the secondary air injection pump and the kombi valves are free of any leaks, and then determine if the N112 valve is functioning correctly. After that I would suspect that one of the kombi valves are clogged with carbon. The SAI system is a problem on many of these cars. In order to swap a kombi valve you're going to need a lot of patience and a modified 5mm allen key to get the job done.

My money would be a cracked hose between the pump and a valve.

 

Thanks Neb.

Looks like I have a lot of learning to do. I appreciate the time you took to reply.