Just wanted to share that indeed my P0445 trouble code was the Purge
Control Valve. After replacing it the check engine light did not go
off after 4 days of driving but then I disconnected the battery and
the check engine light has been off for 5 days now. In my case, I
bought part 28910-22040 (also known as 2891022040) from
it was just shy of $30 and a genuine OEM part. Brainlessly easy to
replace by myself too. Got me some new wiper arms too. So nice to have
the blade actually stick to the windshield again. Ahhh.....