I am getting a p0441 engine code. on 1996 Toyota Avalon

Everything I find tells me this is the vapor canister causing the issue. However, it says this when code is present with p0446. I only have 1 code. What other possibilities could it be when the only code is p0441?

by in Fort Worth, TX on August 22, 2012
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2 answers
ANSWER by , August 22, 2012
could be anything to due the evap system. have a diag with a smoke test to determine prob
ANSWER by , August 22, 2012
3 different compotent failures can cause that code and also the vacume lines that work that system can cause it. Charcoal Canister, Purge Vacuum Switching Valve, Three Way Vacuum Switching Valve