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Registered
Join Date: Jul 2001
Location: Portland Oregon
Posts: 7,007
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Hi,
Oxysensor voltages are usually expressed as Lambda values and there are charts to show what each step means, relative to AFR values. I have one here that I'm planning to upload to our website soon.
Watching an OEM (narrow-band) O2 sensor work and deriving information from it can be difficult sometimes since Lambda numbers change rapidly when the O2 sensor is healthy. This is why we use wide-band O2 sensors with AFR meters which do not "cycle" and display results you can watch.
Some of these instruments can show either AFR values or Lambda voltages.
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