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Pulled an engine code...
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=1&t=47637
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Author:  keep the peace [ Fri Nov 06, 2009 3:57 pm ]
Post subject:  Pulled an engine code...

My check engine light went on and I pulled the code: P0139. Looked it up and it said 02 sensor circuit slow response (bank 1 sensor 2).

What exactly does this mean and is it something I can do myself with limited tools or is it just worth bringing to the shop?

Author:  adamkrz [ Fri Nov 06, 2009 4:47 pm ]
Post subject: 

Easy - Just replace the 02 sensor downstream on the drivers side, - no special tools needed - just make sure your wires are good,about 40 bucks or so for a direct plug-in replacement.

Author:  tjkoen01 [ Sun Nov 08, 2009 10:49 pm ]
Post subject: 

reset it and see if it comes back....had that same code on the wife's '09 caliber and only 13k....reset it and it hasn't come back

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