How do you diagnose reason for check engine light coming on intermittently? on 2005 Audi A4

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
diagnostic code is P0722. Comes on and goes off periodically. How much does it cost to fix?
(1) Answer
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need more information, engine size, submodel build, etc. May be need to go to someplace like AAMCO for a free diagnosis and estimate.
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