Question about 1998 Audi A6

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Engine light on, codes PO455 and PO411 pulled.

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  • Anonymous Feb 14, 2009

    evap

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P0411 Secondary Air Injection System Incorrect Flow Detected and P0455 Evaporative Emission Control System Leak Detected (Large Leak). These 2 particular codes are sometimes inter-related.

With a p0455, the most common repair is to:

  • Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
  • Otherwise, replace the gas cap, and/or
  • Inspect the EVAP system for cuts/holes in tubes/hoses (you may hear a vacuum noise or smell fuel), repair if necessary
Let me know if you have anymore questions!

Sincerely,

JC

Posted on Nov 13, 2008

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