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Ron
Ron, ASE Certified Technician
Category: Car
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Experience:  ASE Certified Tech
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Audi A4 Quattro: 2008 a4 2.0 engine

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2008 a4 2.0 engine check lite is on, initial diagnostic chk. indicates evap. system , what should be chked ? Tried opening & closing gas cap

Hello and thank you for your question,

In most cases Evap system fault codes are due to a Evap sysyem leaks and in most cases the best way to find them is to do a smoke test on the Evap system . Unless you have access to a smoke machine then this is something your going to have to done by a repair facility. Once the smoke machine is connected the leak can be readily found and repaired.
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