error code PO442

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mowingy - 01 Oct 2005 11:48 GMT

Good morning folks. I have an error code PO442 on my 02 Dakota. I have
installed a new MOPAR gas cap with no improvement. Is there anywhere on the
net that I can find a diagram of the evap. emission system so that I can
further troubleshoot? Also, how can I reset the codes to make
troubleshooting quicker? TY in advance for any help offered.

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Sledneck - 06 Oct 2005 02:22 GMT

Along with my 04 H.O CTD I also have a 2002 2500 QC LB 4X4 5.9 gas engine
that was my fathers because he passed away in August. I am getting the same
code. I too changed the gas cap... It still triggers the code. The only way
you can erase it is to unhook the battery or you need a scan tool. Let me
know if you figure out what the problem is.
One thing I did consider was, with the high price of gas my niehbor kid
doesnt have a job but he is always driving around in his truck. I think that
trick from the 70's is back. Stealing gas and forgetting to tighten the gas
cap all the way.
Just a thought.

> Good morning folks. I have an error code PO442 on my 02 Dakota. I have
> installed a new MOPAR gas cap with no improvement. Is there anywhere on
> the net that I can find a diagram of the evap. emission system so that I
> can further troubleshoot? Also, how can I reset the codes to make
> troubleshooting quicker? TY in advance for any help offered.

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jmc - 06 Oct 2005 07:15 GMT

Suddenly, without warning, Sledneck exclaimed (06-Oct-05 2:22 AM):

> Along with my 04 H.O CTD I also have a 2002 2500 QC LB 4X4 5.9 gas engine
> that was my fathers because he passed away in August. I am getting the same
[quoted text clipped - 12 lines]
>>can further troubleshoot? Also, how can I reset the codes to make
>>troubleshooting quicker? TY in advance for any help offered.

I have the same problem, but it's highly unlikely anyone's stealing gas
from my truck. My code changed from this to a different one, which I
don't quite remember but means "it's worse now" (p0455?). I suspect,
since I *never* hear that vaccum sound when I take my new gas cap off,
that the vaccum pump is kaput. Doesn't seem to be a lot of rust on the
- receiver? - but I need to have another look.

jmc

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T. Wilson - 09 Oct 2005 15:16 GMT

My '02 1500 QC set this code. Problem was a split vacuum hose on the
canister. Easy and FREE fix! Only trick was finding the canister. It was
mounted inboard of the drivers side frame rail - under the truck!
HTH
Tom

> Good morning folks. I have an error code PO442 on my 02 Dakota. I have
> installed a new MOPAR gas cap with no improvement. Is there anywhere on the
> net that I can find a diagram of the evap. emission system so that I can
> further troubleshoot? Also, how can I reset the codes to make
> troubleshooting quicker? TY in advance for any help offered.

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