02-23-2011, 08:01 PM
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#1 (permalink)
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| Member Full Access Member
Join Date: Aug 2009 Age: 25
Posts: 65
|  Cel p0420
My car is throwing code P0420. What is the most likely cause, the oxygen sensor or the cat? I've got a high flow cat from Clear Image on the car right now. Any help would be appreciated. THanks.
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Last edited by MaChiBLue; 02-24-2011 at 12:55 AM.
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