Touble code P0456?

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Touble code P0456? - 4/25/2008 1:23:34 PM    delbuort   Posts: 5 Joined: 5/18/2006 Status: offline I've got a code P0456 - EVAP Emission Control System Leak Very Small.  What the He!! is this?  Anyone know where to start looking to try to fix it?  Thanks for any help. Post #: 1

RE: Touble code P0456? - 4/25/2008 1:27:41 PM    Dsmdriver   Posts: 14 Joined: 4/19/2008 Status: offline one of the things that coudl cause that is the gas cap not sealing good or just not turned tight, or there could eb a pin hole in the fill neck hope that helps a lil (in reply to delbuort) Post #: 2

RE: Touble code P0456? - 4/25/2008 10:41:06 PM    delbuort   Posts: 5 Joined: 5/18/2006 Status: offline I thought about the gas cap, I changed it out less than a year ago but I'm sitll having the same problem.  I'll check the fill neck, I'm just not sure how easy it'll be to locate a little pin hole. Thanks for the idea. (in reply to Dsmdriver) Post #: 3

RE: Touble code P0456? - 4/26/2008 12:56:24 PM    jeff66 Posts: 31 Joined: 1/28/2008 Status: online You need to check the entire EVAP system for leaks, start with the gas cap then find the charcoal canister underneath in front of the fuel tank, check the vac lines coming off the canister. _____________________________ 2002 Durango SLT 4x4 5.9L 2001 Jeep Cherokee Sport 4x4 4.0L 1996 Jeep Cherokee Sport 4x4 4.0L (in reply to delbuort) Post #: 4

RE: Touble code P0456? - 4/26/2008 2:24:30 PM    delbuort   Posts: 5 Joined: 5/18/2006 Status: offline I'll try that first thing in the morning.  I didn't even know there was a charcoal canister under there.  If there's a leak, shouldn't/will I see fuel leaking out somewhere? (in reply to jeff66) Post #: 5

RE: Touble code P0456? - 4/26/2008 5:02:48 PM    jeff66 Posts: 31 Joined: 1/28/2008 Status: online no, it pulls fuel vapor from the fuel tank. You get a small leak code because the pump that pressurizes the evap system is running too much to maintain pressure, this is how the pcm detects a leak. if it runs all the time you get a large leak code. _____________________________ 2002 Durango SLT 4x4 5.9L 2001 Jeep Cherokee Sport 4x4 4.0L 1996 Jeep Cherokee Sport 4x4 4.0L (in reply to delbuort) Post #: 6

RE: Touble code P0456? - 4/27/2008 12:57:22 PM    delbuort   Posts: 5 Joined: 5/18/2006 Status: offline Hum, yep...I had no idea.  It was raining cats and dogs here today so I'll have to try to check it out tomorrow. (in reply to jeff66) Post #: 7

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