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Paul M ASE Master
Paul M ASE Master, ASE Master Tech
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Experience:  ASE Master Tech 20+Years
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Audi TT: I have a 2001 audi tt 225 turbo and the Check light

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I have a 2001 audi tt 225 turbo and the Check light goes on and off for this code P0411, any reason why?

Hello I'm Paul and I will help you with an Answer to your Question


this code is for the secondary air system part of the emissions system


most often a valve and or air pump fails in the secondary air system.


you will need to have the system diagnosed to see which part has failed


I am attaching the test information


click here to view test info on p0411

this type of diagnostic would run around $100 at a shop to determine which parts have failed


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