Engine code p0442: Evaporative emission leak - Dodge Dakota Forum : Custom Dakota Truck Forums
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post #1 of 8 Old 02-10-2011, 07:26 PM Thread Starter
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Engine code p0442: Evaporative emission leak

my check engine light came on maybe a week or 2 ago and i took it to auto zone to get a free engine code and it came up p0442 which is small evaporative emission leak. the guy told me it from topping off when filling up and newer vehicles you arent supposed to top off or whatever and he said it should go away in a couple days, or there is a small leak in the tube from the main gas tank going to "the little tank under the drivers side" meaning the charcoal canister... well its still on so i decided to google the code and it seems like it is a common problem for dakotas. many of the forums i found said that it could be as simple as replacing the gas cap with a new one and others had to mess with the canister tubing.

tl;dr has anybody else gotten this check engine code and what order did they take in fixing the problem


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post #2 of 8 Old 02-11-2011, 06:57 AM
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i had that code like 1.5 years ago. after some online research i found that many people found problems with the "fittings" that goto the charcoal canister under the driver's side.
just like them i covered the connectors in electrical tape, and havent had the code since.

besides its an easy fix to try.


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post #3 of 8 Old 02-11-2011, 10:02 AM
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it's not a big deal, don't worry about it. just check all the vac lines for the evap system for cracks. it's not something that needs to be done right away as it won't change anything driving it like that.


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post #4 of 8 Old 02-11-2011, 12:39 PM Thread Starter
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im not super technical, but how do i check if the problem is fixed after taping it? will the light go off automatically or will i need to reset the computer or something?


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post #5 of 8 Old 02-14-2011, 07:02 AM
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yes you will need to reset the PCM and see if the code returns or not. just unhook the batt for a while to take care of that.


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post #6 of 8 Old 02-14-2011, 09:16 AM
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its a common problem for all dakotas the guy i worked with his main vaccum line was cracked and that was the problem


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post #7 of 8 Old 02-17-2011, 08:43 PM
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It could be a gas cap or an o2 sensor! Mine comes on but I took the catalytic converter off
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post #8 of 8 Old 02-18-2011, 03:46 PM Thread Starter
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replaced my gas cap and 3 days later my check engine light went off!


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