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primary O2 sensor verses secondary
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Mark Blab Offline
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Post: #1
primary O2 sensor verses secondary
I would like to know if on my 2001 Honda CRV I need to adjust the primary O2 sensors offset voltage higher or lower than the secondary O2 sensor? Anyone have any experience with what works best in these scenarios in general?
07-27-2008 03:48 PM
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colchiro Offline
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Post: #2
RE: primary O2 sensor verses secondary
You shouldn't need to touch the post-cat sensors (the ones after the cat). They usually just report the health of the cat converter.

The pre-cat sensor controls your air fuel ratio and that's the one we want to tweak with an EFIE.

Rick

Links: Documents / Tuning for Mileage | Toyota Sensors | Autoshop Sensor Tutorials
07-27-2008 06:21 PM
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Mark Blab Offline
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Post: #3
RE: primary O2 sensor verses secondary
Thanks for the reply, that makes things much easier.
07-28-2008 02:47 AM
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