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  1. M

    2010 Liberty code P0456

    I had this exact same issue on my 07. Turns out it was the fuel vapor leak detection pump. Hope this helps.
  2. M

    Check Engine light code p0455 and p0456 for 2007 Liberty

    I have a 2007 jeep liberty that I bought earlier this year. The code p0455 and p0456 recently popped up and my first response was to replace the gas cap since that is a common issue related to those codes. After replacing it twice the codes came back both times. During idle the car seems to run...

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