Unfamiliar with the r18(secondary o2)
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Honda-Tech Member
Joined: Dec 2004
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From: NJ
Unfamiliar with the r18(secondary o2)
My friend threw a secondary o2 code on his 06 civic lx sedan. Are the secondary o2s located in the cat right off the header as in the 99-00 dx engines or are the cat and secondary o2 sensor under the cars? Sorry to ask but the search sucks and their isn't a faq for the 06+ cars yet. Thanks for any info
Honda-Tech Member
Joined: Nov 2006
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From: Los Angeles/Orange County, CA, USA
Re: Unfamiliar with the r18(secondary o2)
the primary o2 sensor is located in the cat. secondary i would assume is after the cat. i believe its located in the downpipe.
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