O2 Codes P0031/P0037/P0051/P0057 - Page 5 - JeepForum.com
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Unread 02-25-2012, 09:01 PM   #61
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2006 LJ Wrangler 
Join Date: Feb 2011
Location: Wasatch, UTAH
Posts: 75
Update* I replaced the bosch sensor for the ntk/ngk sensor and the P0152 code hasn't been back within 150 miles so far so good.

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Unread 06-10-2012, 10:18 AM   #62
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2006 LJ Wrangler 
Join Date: Sep 2004
Location: Charlotte, NC
Posts: 107
Btw, i know this is an old post, but after having my pcm and spark plugs replaced, i was still getting codes...i bugged the dealer and told him that i suspected the cat closest to the manifold. They tested it and said sure enough and replaced it for free under the 8/80 warranty. Everything has been working great since then...i also noticed a significant power increase... Which is awesome!

So it turned out for me the problem was a combination of three things possibly interrelated... Pcm, spark plugs, cat. Theoretically it is possible the pcm killed the spark plugs and the cat.

Hope this help anyone else with these issues.
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Unread 06-10-2012, 01:53 PM   #63
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2005 TJ Wrangler 
Join Date: Aug 2009
Location: Eastvale, CA
Posts: 1,366
Problem fixed! Ended up being a bad PCM. Ordered a rebuilt one online and all is well
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