Man I have been having trouble with this.
Code just all of a sudden popped up this morning.
Spent some time researching, but doesn't seem to be that common. Not rare, but not deeply discussed.
So what unit is the Evap Vent Valve? I haven't been able to find a single picture on the forum showing this that still works. I've seen people say its under the car, some say it's in the engine bay. No one mentioning part numbers. One dude talks about a spider, Honda has a TSB talking about spiders. I found on youtube, someone talking about it, I think it was that first guy, and I found that part he was talking about, but mine was empty. Dusty... but far from clogged.
Side note, it's possible its a gas cap.. since I'm starting to suspect my gas cap is not oem.. but it never had this code before and my gas cap doesn't go through much wear since I don't drive this that often at all.