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Dan
Dan, ASE Certified Technician
Category: Car
Satisfied Customers: 1422
Experience:  Dealer Auto Technician
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I have 2006 Audi A4 Quattro 2.0 turbo. It has a p0442 code I

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Hi I have 2006 Audi A4 Quattro 2.0 turbo. It has a p0442 code I changed the N80 valve with an oem part it did cure the p0456 but the p0442 came back after a few days of driving.

Hi Im David, thanks for visiting the site. the most common cause for p0442 is a loose or faulty gas cap, but the probable cause is a small leak in the evap lines or hoses. I recommend having a smoke test done on the evap system to pin point the leak.

Customer: replied 13 days ago.
Thank you I am a mechanic as well I realize all this as common problems but I am looking for a common problem with this vehicle other than the N80 valve.
Customer: replied 13 days ago.
I am looking for an answer from a Audi dealer mechanic.

the common problem is a gas cap. the only other COMMON problem is a leak in the evap lines or hoses.

Customer: replied 12 days ago.
Ok thanks

Have a smoke test done and please get back to me with the results so I can close this out. thank you

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Dan, ASE Certified Technician
Category: Car
Satisfied Customers: 1422
Experience: Dealer Auto Technician
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