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Just got a P0420 code a couple of days ago and my FE has plummeted to ~33mpg. My gut tells me that it is the O2 sensor ahead of the cat; I figure that one would be used to trim the fuel air mix. Any thoughts?
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"Jesus didn't bring 'Natty Lite' to the party. He brought the good stuff."
Last edited by chuckm; 12-17-2008 at 08:01 PM..
Reason: spelling
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