p0446 code, what do I check first?

I'm having a similar problem P0440 and P0446, and i'm wondering if the Valve you are talking about is the one linked above that looks like dorman 911-601 or if you are referring to one of the things that is literally attached or molded into the top of the Charcoal Canister?

Ive checked all 3 of the VSV's i could find and they all worked... as far as I could tell

 

I called Dorman and the guy said the 911-601 would not work. There is a VSV that is on the right hand side of the canister (when looking towards the engine). It is attached with a clip and a screw. That is the one which was bad for me.

If you need a charcoal canister, I have one for cheap. It doesn't come with the VSV though.

 

Hi my name is Julie… you guys are so lucky that you can fix your own trucks! If I could, I would. I went to smog my truck and it wouldn’t pass. Codes P0440, P0442, and P0446 are listed on my rejected test slip. I have been reading that I should try a new gas cap before moving on to other “fixes”… whatever those are???

Anyway, I just took a look at my gas cap. It is a manufactures cap, but it looks pretty old. I do click the cap when I buy gas, but there is not suction at all when I open the cap. Is there supposed to be suction or not? I am so worried that a garage is going to take advantage of me. I would appreciate it if someone would please help me by advising me on what steps to take in this process so I don’t get totally ripped off by a repair shop.

Right now my plan is to buy a new gas cap. Then I was thinking about asking a garage to reset the engine light and then try to pass smog? What do you guys think? Good idea? Bad idea? What should I do if that doesn’t work? Usually I wouldn’t mind shelling out the dough, but I was recently laid off and money is really tight.

 

OH BEN! Thank You, Thank You, Thank You... ah, which one is the NEGATIVE battery cable? I remove it how... with my hands? Wrench? Use gloves?

 

Update for anyone finding this through a search.

The Dorman 911-601 DOES work. The hose ports are in a slightly different position but close enough. You don't even need to remove the old valve if it's a rusty mess like mine was - just bend it out of the way and zip tie the new one in position. I cut the bracket so i could remove the old valve for bench testing.