apquest

My check engine light went on so I stopped by AutoZone for a free diagnosis. The error message was 'P0411: Secondary air injection- incorrect flow'.

Does anyone here have experience with this and know what the problem for the check engine light is? Also, I'm assuming that I can still drive the car until I get this fixed, right?

-Alex

TTschwing

And never come back. Sometimes this code just happens but I would check the Vac line (the braided one) between the combi valve and the manifold. High failure rate on that hose, simple fix.

Is that pump unusually noisy? (they come apart too, but can be fixed)

joe@vwvortex

using a good gasket/sealant and then reassembling with bolts/screws. Very common problem. Mine was covered under CPO.

TTschwing

On a car as old as yours.

1st would be to replace the 2 Vac lines to the Combi Valve and FPR. They are the only Braid covered lines at the front of the engine. the rubber deterirates under the braid and is a chronic source of leaks. 4mm silicone will fix you right up there.

If your pump is noisy it may be coming apart. easy to fix..

See Andrew's post below or do a search. Several have saved this $200+ part by replacing the failed rivets..<ul><li><a href="https://forums.audiworld.com/tt/msgs/1574799.phtml">https://forums.audiworld.com/tt/msgs/1574799.phtml</a</li></ul>

apquest

Cool thanks guys. I'll check those things asap.

SpongeBobTT

At least that's the last to remain from the "codefest" I had a month ago.

This one's just annoying.