p0456 and p0442 Small/Medium Evap leak - Page 2 - JeepForum.com
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post #16 of 18 Old 11-02-2011, 12:31 PM Thread Starter
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2003 WJ 
Join Date: Dec 2010
Location: Denver
Posts: 259
Originally Posted by orb View Post
No codes yet, the gas cap may have worked!! So excited, hope it stays this way.

The cap didn't have a part number on it when it came, it was only listed on the amazon site. Looked brand new though, couldn't tell it had been used.
****. It came back. P0442. I really don't want to take the bumper off. ugh.

2003 4.0L, OME HD Springs, OME Nitro Shocks, Rancho SS, 265/70R16 General Grabber AT2s
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post #17 of 18 Old 11-02-2011, 01:56 PM
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2000 WJ 
Join Date: Jun 2010
Location: Massachusetts
Posts: 1,571
same issue here. on my second gas cap thinking the press relief style cap might be causing it. took a long time for it to come back on this time. seems that it comes on after a few short trips as opposed to long trips. the jeep only made long trips until today and it came back on. mine has graduated to a large leak too.

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post #18 of 18 Old 11-02-2011, 05:13 PM
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Join Date: Aug 2008
Posts: 2,521
just pay a shop to do a smoke test and see were the bad line is and fix it.
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