Hello to all, first post, past lurker.
Pulled this code from my 02 A4, 60K miles. Searched thru posts, got a ton of good info, so I got busy.
Checked the air & vacuum lines on the whole system - all OK. Looked for the fuse/relay for the secondary pump and could not find anything that was labeled in the fuse/relay center that's under the left side of the dash. Also checked the fuses at the left end of the dash - they are labeled, but nothing for the pump. I found a 50 amp fuse in the under-dash center, maybe that's the one for the pump, but it was fine.
Next step is to get out there in the morning for a true cold-start condition, which, as far as I understand, is the only time the secondary pump will run.
Questions - anybody out there that can tell me for sure where the fuse is for that friggin pump? Also, any other suggestions for troubleshooting?
I'm going to contact Audi today as well - might be an off chance that the emissions equipment might still be under warranty, but I doubt I would be so lucky.
Thanks for your help.

 

My sec air pump runs every time I start up (unless its like 90 degrees out). I;m starting to think it has a problem, but no codes...
I haven;t looked at it yet, so no idea where the fuse is for it.

Certain emissions equipment have longer warranties if you are in certain states (ie. Cali).