P0440 - Dodge Durango Forum
4.7L/4.7L HO/4.7L Gen II Engines Questions regarding the 4.7L V8 engine

 
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post #1 of 9 Old 02-26-2009, 12:13 AM Thread Starter
srt8durango
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P0440

Has anyone ever gotten this code before? my wife said she got the "engine" light mon. and Tues but it went off today. i checked it and there is a P0440 code, but I checked the list and I do not see a P0440 listed, any help on this one would be great

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post #2 of 9 Old 02-26-2009, 12:15 AM
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I think my truck has that code, i just have to go read it again..i have cleared a code out of my truck off and on for the past year or so.lol

It might have some thing to do with a small emission leak..my friend doesnt have the equipment to check more into it. So i just leave it alone for now.
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post #3 of 9 Old 02-26-2009, 05:39 AM
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p0440 - General evap system failure.

i would check the evap/purge valve. oh and i believe this code is also thrown when the gas cap isn't screwed on as tight as it should. that could explain why it might have tripped one day and gone off the next.
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post #4 of 9 Old 02-26-2009, 05:39 AM
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Might just be the gas cap.



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post #5 of 9 Old 02-26-2009, 06:05 PM
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Yea P0440 is a EVAP System Fault code, means there is prob a large leak somewhere. The 2 most likely culprits are the Vent Soleniod Valve and the gas cap.

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post #6 of 9 Old 02-26-2009, 06:08 PM
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Where is the Vent Solenoid Valve at?
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post #7 of 9 Old 02-26-2009, 06:13 PM
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True story, our 04 Grand Caravan out of nowhere threw that code. I checked the gas cap, traced out the evap lines for cracks, etc... Couldn't find anything. Then I happened to notice that after the last oil change, I forgot to put the oil filler cap back on. I put it back on and the code cleared, no kidding. Maybe check that the oil filler cap is on tight.

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post #8 of 9 Old 02-26-2009, 09:14 PM
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i've had this code for a while now and i just ignore it cause it's really no biggie. i don't feel like tracing out all the vac lines. if you take it to the dealer they will make you replace the $250 pump which most likely isn't the problem so beware. i've tried the gas cap and no joy.


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post #9 of 9 Old 02-27-2009, 12:52 AM Thread Starter
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I found out the wife bought gas Wed. and chalked it up to the gas cap not being on tight. I have been getting P codes for the Evap lines for about a year now but just reset the codes after checking the lines. All the codes come up as something related to the Evap system either leaking, detecting a small leak or some other $10 sentence. Thanks for the help guys....hope to have the pictures of the truck up this weekend.

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