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Will this code prevent passing a smog test?

Vehicle: 2001 Audi A4 four cylinder.

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Hi there, 

Yes, it is possible for this code to fail a smog test. Here is a list of possible causes for this code.

P0411 AUDI - Secondary Air Injection System Incorrect Flow Detected

Read more: https://www.autocodes.com/p0411_audi.html

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