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Evap vent valve clogging
Got a PO446 code on my 2001 Tahoe and it turned out to be the Evap. canister vent valve was clogged with loose dirt. This seems to be a design problem due to its location and the poor filtering with the valve. I saw a 2002 tech bulletin that described a new valve for pickups that had an improved filter with a easily removed cover for cleaning. Mine was a pain to clean, as I had to completely remove it from the vehicle. I drive on many dirt roads in Idaho, and this looks like it :confused: is going to be a regular thing.
Any one know about this problem, and if a fix is available? I am out of warranty, and my dealer was no help with info.
Joe from Boise
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09-17-2003, 11:11 PM
