Toyota Repair: Engine Codes for 2000 Toyota Sienna, toyota sienna, p0440

Question
Hi,  I have a 200o Toyota Sienna and the check engine light just came on.  The codes that it is spitting out are p0440, p0441, and p0446.  What are these codes, how urgent is the repair? and is it a couple hundred dollar repair or a 1000 repair?  Thanks much.

Answer
In most cases this all of these codes are caused by a loose or missing gas cap so check for that first.
Toyota had issued a service bulletin in 2003 that addresses this condition(TSB013-03) it calls for replacement of the canister closed valve(CCV) located on the backside of the air filter, the part number is 90910-12209, I believe it costs around $80 and you can replace it yourself.