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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