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Old 04-17-2013, 08:22 PM   #1
Join Date: Jan 2013
Location: Post Falls, Idaho
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engine code help needed please

i have a 2004 unlimited 4.0 with auto and these two codes come up on the reader p0455 and p0442 can someone tell me what they are? I do know that it is an emissions problem, the 455 is a large leak and the 442 is a small leak. It just showed up after work so have not gone far with it .

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Old 04-17-2013, 08:29 PM   #2
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Join Date: Apr 2013
Location: SE Michigan
Posts: 14

Use the online repair manual. I think the codes are under Emission controll systems. I can't check for sure it won't work on my phone.

Hope that helps.

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Old 04-17-2013, 08:40 PM   #3
Join Date: Jan 2013
Location: Post Falls, Idaho
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thanks i think it is the fuel cap will check on it in a moment but thanks for the info. hopefully nothing serious as it is bear season and don't need a problem before i leave
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