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Old 01-09-2006, 04:06 PM   #3
PorscheDoc
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Join Date: Aug 2005
Location: Overland Park, KS
Posts: 180
The code reader may give you a MAF code, or it may give you oxygen sensor codes on bank 1 AND bank 2 or a combination of both the MAF and O2 (bank1/2). If it gives both banks, then it is likely the MAF sensor gone bad, and you can ignore the o2 sensor codes. If it gives no maf code, and just an O2 sensor on bank 1 OR bank 2 then the culprit is a bad o2 sensor on that side (you will replace both pre and post o2 sensors on that one side if this is the case).

I am suprised the K&N hasn't blown the MAF sooner, it seems to be the trend.
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Karl Wilen
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