mbertoli
2/6/2008 9:09:36 PM
Hey everyone,
just wanted to share my p0411 solution (01.5 a4 1.8t); hopefully this will help someone else out that has the same problem. i know that the yellow CEL was eating my soul!~
ok, basically i inspected all the vacuum lines from the secondary air pump up to combi valve in back of head. everything was ok; no cracks or kinks.
made sure my secondary air pump was working (runs for about 30 secs on cold start, then stops as idle drops to 900rpm).
at your combi valve, there is a big vacuum hose going in on the passenger side. there is also a small hose coming out of the opposite (driver's) side of the combi valve. that's where my problem was. the hose coming out of the combi valve appeared to totally disintegrate, and it was just hanging there disconnected!
so i grabbed a fitting, put on a new hose and hooked it all up. didn't pay a penny!
hope this helps.
also wanted to thank the board. you guys got me started on this solve. thanks
Micah
WolfsA62.8Q
2/6/2008 9:23:10 PM
Thanks for sharing this info, I'm sure many others will find this quite usefull for their cars. Audi uses very stiff plastic hoses for vacuum lines, which get brittle with miles/time. When they crack/ leak you get that P0441 code, as I have in the past.
Glad you got yours fixed.
SilverA4q
2/16/2008 5:14:35 AM
great post man. I had the same code and that is exactly what my problem was. Im just happy that that was what it was and not the pump going out.Thanks for the post. Big help!
matasci
2/16/2008 4:59:12 PM
i also had a problem with my vacume lines i had them all redone. now my combi valve is stuck open. so i gotta get one of those befor i pass smog.
CJRando
7/7/2008 7:03:38 AM
I got to give this post a bump! I searched and searched many sources with no answer to my problem until I found this post. My hose was still connected to the combi valve, but the rubber was disintegrated under the cloth cover. On visual inspection it looked fine. When I touched it, it turned to dust. Great info!
