by itself or do you have to buy whole canister?

Question

2002 toyota sienna xle trouble code 0446
is this a seperate part ?

Answer 1

P0446 Evaporative emission control system vent control malfunction

You can purchase the part separate, before you purchase it, check the emission hoses at the air filter housing , the hose there tends to disconnect and set this code. Other than that the component that set this code are either the vapor switching valve or the vapor sensor .