Thread: P0421 Code
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Old 08-29-2010, 10:59 PM   #12
snicknc
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Join Date: Aug 2010
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2002 VUE 3.0L
Default Re: P0421 Code

Wow.

So it seems it could still be an O2 sensor then. I'd actually looked up the positions previously, and it seemed to indicate that Bank 1 was on the front of the engine. I can't believe I mixed that up.

Well, I suppose I'll go back to pulling O2 sensors then. I'll revert that modded one back to stock and see what we have on the back two sensors.

Thanks for the heads-up.

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