EVAP System. DTC P0449
CF Beginner
Joined: Nov 2009
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My local repair shop found a GM bulletin which says the EVAP atmospheric vent opening may have spider webbing inside. This causes a pressure increase in the EVAP reservoir and triggers the PO449 code. I am not an expert so he has ordered the new parts for me.
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jvelasco23
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Oct 29, 2013 8:21 PM
