mtyink

Does anyone know how to analise a OBD2 "PO446" on my 1999 es300 Lexus. The engine and trac off light came on and then I ran a code test with my Actron CP125. The code read: "2 codes" "PO446 and PO446 pd." I just recently turned over a 100,000 miles on the car and have relatively minor problems with my Lexus in the past. It might the evaporative canister but would like some experineced input first before shelling out a lot of $$$ for this. All experienced answers welcomed.....thanks in advance