Arizona All Nissan Club

General Discussion => How To / DIY => Topic started by: AZXTERRA 1994 (Jake) on April 17, 2015, 02:26:37 PM

Title: Error code P1446 Canister vent control valve closed
Post by: AZXTERRA 1994 (Jake) on April 17, 2015, 02:26:37 PM
Recently went 4 wheeling at table mesa and then next day my SES light came on. Went to autozone and they gave me an error code of P1446. I did some research and it has to do with mud and dirt getting into my Vapor canister. Autozone gave me the probable cause of failed canister vent solenoid and failed EVAP pressure sensor. I'm having a hard time figuring out what I need to buy and replace. I'm planning on fixing this myself and I was wondering if anyone else had the same issue and could steer me in the right direction.
Title: Re: Error code P1446 Canister vent control valve closed
Post by: Conundrum on April 17, 2015, 03:14:40 PM
If you had a full tank maybe the evap line got some fuel in it? Remove, clear the line and reset the code. Some places don't reset the code anymore for liability issues, but driving 3-4 driving cycles would clear it automatically if it's fixed. You won't have to worry much about it till you need to go through emissions.
Title: Re: Error code P1446 Canister vent control valve closed
Post by: AZXTERRA 1994 (Jake) on April 17, 2015, 03:44:36 PM
Yeah I could see the line getting clogged with something. Need to get a new jack in order to lift my car up and take the rear plastic inner wheelwell off since the larger tires lol Thanks for getting back to me
Title: Re: Error code P1446 Canister vent control valve closed
Post by: Conundrum on April 17, 2015, 03:48:55 PM
NP Good luck!
Title: Re: Error code P1446 Canister vent control valve closed
Post by: Xtracrispy on April 17, 2015, 05:32:16 PM
I was plagued with that code for a long time. Earlier model Xterras fuel system vents directly into the frame inboard of the rear left quarter step. It doesn't take too much of a genius to realize there is a ton of dust under the rear of an off road vehicle (thanks nissan). Dust works its way in an clogs the vent control valve mounted on the charcoal canister.

At some point (As a TSB and/or general improvement, not sure what year) they added a small filter inline to keep the dust out, along with a more powerful solenoid on the vent valve. I got the updated valve and filter kit and have had no problems for some time. If you already have the filter there is a good chance its plugged with dust, and if not the valve will need to be cleaned or replaced.

Also, you shouldn't blow compressed air into the charcoal canister, because gas fumes can ignite with the pressurized air. But it you were to do that with the canister and all lines removed, I bet a lot of dust would blow out of the canister itself.
Title: Re: Error code P1446 Canister vent control valve closed
Post by: AZXTERRA 1994 (Jake) on April 17, 2015, 07:42:00 PM
Yeah I might end up removing it from all lines while I'm down there and blowing it clean. I watched a few guys on youtube do it (lol know its not a reliable source for info). But I will check and see if the vent control valve is damaged. Did you just order the parts online? or did you go pick them up somewhere else? I would rather not have to wait for them to come in the mail
Title: Re: Error code P1446 Canister vent control valve closed
Post by: Xtracrispy on April 17, 2015, 08:19:38 PM
I think I ended up getting the new valve at a local dealer (In San Diego before I moved) but had to order the vent kit online.
Title: Re: Error code P1446 Canister vent control valve closed
Post by: PitSnipe (Kyle) on April 17, 2015, 08:36:17 PM
If you cant get to an auto parts store to reset the code you can disconnect the battery for at least 30 seconds. This will wipe the computer and clear the code. If the problem is serious the engine light will come back on.
Title: Re: Error code P1446 Canister vent control valve closed
Post by: Hammer (Avi) on May 04, 2015, 04:17:26 AM
Any conclusion to this one, I think I had the same code and reseated my gas cap. 
Title: Re: Error code P1446 Canister vent control valve closed
Post by: AZXTERRA 1994 (Jake) on May 04, 2015, 03:44:06 PM
Disconnected the battery and it eventually went off. I haven't looked further into it yet