Focus Fanatics - View Single Post - rear (bank 2) oxygen sensor code
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Old 07-09-2013, 02:58 PM  
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Join Date: Apr 2012
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Location: duluth, MN
What I Drive: 2009 Amber Gold Metalic Focus

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They are all connected. And if the amount of exhaust is effected it will effect the cat which will effect the O2 sensor.

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2009 Ford Focus Sedan SE--Amber Gold Metallic--FS Cool-flo intake, 17" Black Kazera Rims with Potenza S-04PP, Custom 2.5" Exhaust.
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