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Old 11-04-2013, 10:41 AM   #15
Drphil
midlifechrisis
 
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Join Date: Feb 2012
Location: south carolina
Posts: 108
that sounds more like the upstream O2 sensor . i did this and never ended up replacing the CAT, but i did order new 200 cell sport cat headers (stainless steel) but have not gotten around to replacing them. I replaced the O2 sensor- paid $150 for the sensor, (@$650 for the CATs) but have not put the CAt on , just have not had time and the originals are doing fine, 6k miles and no more codes being thrown. i am sure it was a sensor issue not a CAT issue.
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