Hey, back again.. Lol just got a 2006 A4, just got back in from the shop that don't know too much about Audi cars. They scaned the car and 3 codes came up. P0234.....P0304.....P0171... Does anyone here had these codes before ? What should get change or looked at ? If possible can you tell me parts # and links or write ups please. Any help will do. Thank you.


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