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  #1  
Old 03-14-2010, 07:21 PM
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P0441 code, common problems?

Its the evap system (could be 1 of like 15 things). Has anybody had problems with this and fixed it? Are there other things that could cause this code to look out for?
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Old 03-15-2010, 12:26 AM
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I had p0455 which is a large leak, it turned out to be a cracked vacuum hose around my battery. I replaced it last week, and it went away.
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Old 03-15-2010, 01:01 AM
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mine was gas cap and a split in a evap hose. i guess that they used cheap evap hoses and they tend to crack at endsblkjak.
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Old 03-15-2010, 01:05 AM
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Yep, nice big crack on the end right there. haha
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Old 03-15-2010, 08:22 AM
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I get the 0456 code (small evap leak) and I cannot for the life of me find out whats causing it. I've checked the vacume hoses and none of them are cracked or leaking, could the gas cap really be the culprit?
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Old 03-15-2010, 09:02 AM
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Quote:
Originally Posted by Josh_101 View Post
I get the 0456 code (small evap leak) and I cannot for the life of me find out whats causing it. I've checked the vacume hoses and none of them are cracked or leaking, could the gas cap really be the culprit?
yes it could. I replaced my gas cap last year, but my code just came back. Next step is to check my hoses.
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Old 03-15-2010, 10:01 AM
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Originally Posted by Josh_101
I get the 0456 code (small evap leak) and I cannot for the life of me find out whats causing it. I've checked the vacume hoses and none of them are cracked or leaking, could the gas cap really be the culprit?


answer: yes
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i have read that the stealerships have a smoke machine that forces smoke thru evap lines to find a small leakblkjak.

A small leak in any of the EVAP hoses or fuel tank hoses
A small leak in the purge valve or vent valve
The EVAP Canister may be leaking


http://www.obd-codes.com/forums/viewtopic.php?f=1&t=454
There's also TSB's fro some dakota's that address erroneous dtcs for evap leaks meaning the code is being set under certain conditions but the system is still sealled and functioning as it should. It essentially reprograms the PCM to be less sensitive, they'd have to run the software # in your PCM to see if the flash is appplicable, Lastly with the dealer scan tool these codes are relatively easy to fix because the factory scanner will actuate all components in the evap system plus run a test after any repairs have been done to check the sealing capacity of the system, so if your truck is failling the monitor that frequently then it should be easy to find the leak. If your dealer doesn't have a working smoke machine then find another dealer because they probably don't know what they're doing anyway.
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Last edited by blkjak; 03-15-2010 at 10:33 AM. Reason: added info and link
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Old 03-15-2010, 12:01 PM
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Quote:
Originally Posted by Josh_101 View Post
I get the 0456 code (small evap leak) and I cannot for the life of me find out whats causing it. I've checked the vacume hoses and none of them are cracked or leaking, could the gas cap really be the culprit?
When my dad owned this truck. I got the 0441 code, or whatever code the OP is getting. I'd actually get 2 codes. Both evap. Well we took it to the dealer and the replaced the gas cap and reset the codes. Well, it'd come back. My dad bought about 3 gas caps before giving up since it didn't do anything to harm the truck.

When I got the truck, I went on the hunt for whatever it may be.



I thought this was giving me the problem. But it wasn't. It was that hose that you see in the picture. It was rotted and had holes in it. I replaced it from the dealer for about 8 bucks.

One of the codes went away. But I still had the other. I always heard a hissing noise from under the hood. Like leaking air. So I went on the hunt and found that it was the charcoal canister right next to the battery. So I got that replaced, ever since that. I've been code free. Check those areas out.
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Old 03-15-2010, 12:06 PM
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Oh, and if you want. I uploaded this thing I use to get part numbers. I don't know what it is exactly, but it's has EVERYTHING you could think of. It's from an 04.

http://www.4shared.com/file/24161939...artsnet20.html
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  #10  
Old 03-15-2010, 05:36 PM
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it doesn't take much to set off an evap leak code, usually you can't even see the leaks it can sense, sometimes the only way to find that is use a low pressure smoke machine.
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