Thread: P0420 Code AGAIN!!!
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Old Sep 21, 2005 | 07:34 AM
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98CoupeV6
lots and lots of fail
 
Joined: Dec 1999
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From: Deeeeeeeeeeeeeeetroit
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Why are you replacing O2 sensors? P0420 is a catalyst efficiency code.

Edit: In my AV6, anyway. What engine do you have?
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