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This is a discussion on Wideband Gauges within the Forced Induction forums, part of the LSx Technical Help Section category; ...
02-28-2011, 07:39 AM #1
What is the difference between Wideband and Narrowband?.... Besides one being narrow and one being wide. I know it reads air and fuel, but what’s the difference between the two?
02-28-2011, 12:02 PM #2
A wide band gives a more precise measurement of the AFR's.
Whereas a narrow band has less function and gives a more basic less detailed reading of AFR's.
More or less just enough to make it have Idle/driveability and pass emissions..
Last edited by Smittro; 02-28-2011 at 12:04 PM.
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03-02-2011, 05:37 AM #3
The narrowband O2 is only accurate around stoich, which is 14.68-ish:1. This is the leaner mixture level that your car targets in closed loop (light throttle/cruise/etc) and they provide the feedback for the PCM to maintain this range through a process called trimming.
The wideband oxygen sensors can see a much broader range of AFR; typically 10-20:1 (instead of just mid-high 14s like the NBO2) and must be used for WOT AFR measurement.
03-02-2011, 11:02 AM #4
Thank you Gentlemen, That's what I was wondering.
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