Thread: P0421 Code
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Old 08-26-2010, 04:59 PM   #2
Chazberry
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Join Date: Feb 2005
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Default Re: P0421 Code

Quote:
Originally Posted by snicknc View Post
With just this code popping up, is it probably that post-cat O2 sensor on the front, or the cat itself?
This is a good read even if it isn't a good fix . . .
http://www.club3g.com/forum/performa...t-5-bucks.html

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