90K 06 Honda Accord LX SE - Check Engine Light Went On

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#21

08-07-2012, 08:55 AM

sc30317

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Join Date: Jun 2012

Posts: 9

redbull-1,

I think you are talking about the secondary sensor? I need to replace the primary sensor?

#22

08-07-2012, 09:05 AM

redbull-1

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Join Date: Oct 2010

Location: United States

Posts: 7,083

That is the primary sensor for the four cylinder. The four cylinder has the air/fuel ratio (primary) sensor before the cat and the secondary O2 sensor at the cat.

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