View Full Version : P0411 - check valve clicking 1.8t

03-26-2007, 08:54 AM
I've got a friend that has this code on his 2000 passat 1.8t tip. I vagged it and this was the only code - I told him not to worry about it. I did notice however the check valve above the airbox is clicking.

Could this be the cause of this code? What does that check valve do?

03-26-2007, 09:56 AM
that's normal that it clicks. but if vag says its faulty try replacing it.

03-26-2007, 10:46 AM
I have some new check valves sitting around unopened if you are interested.

03-26-2007, 10:48 AM
How much you want for one?

At least I think thats what clicks on mine, it clicks when the engine is cold...