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P0446 Diagnostic Trouble Code Discussion for March 2008

EVAP Vent System Performance

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Trouble Ticket Help Requests for DTC P0446
Help Request Posted
2005 GMC Yukon Denali 6.0L MIL Lamp on VIN: 1GKEK63U05
P0446: EVAP Vent System Performance. Hi guys and gals, this yukon will not except fuel at a normal rate. Takes about 20 minutes to fill the tank. Code PO446 is active. My Alldata is not giving me alot of infomation on this. I removed the solenoid for the rear of the tank wich i believe is the ven...
March 12, 2008