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Old 07-01-2009, 05:53 PM   #1 (permalink)
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Simple 2 or 3 LED rich/lean 4wire O2 sensor indicator

Hi All,

Has anyone used a simple rich/lean indicator connected to a typical car's standard (4-wire) O2 sensor as a driving aid?


red for > 0.55V
yellow for 0.4 - 0.55V
green for <0.4V

(exact voltages may vary)

So that the driver has feedback on keeping the ECU out of rich/power mode?

Maybe it can be simplified to red/green with a threshold at 0.45V, or a single on/off LED...


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