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Old 07-06-2020, 10:13 AM
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Scott.T Scott.T is offline
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Join Date: Sep 2008
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Only Lambda Project would know if the input is ok to handle this on the ECU.
Do you have to rescale the input in the ECU software. If not I guess the scaling is the same so the voltages will be similar.

The lambda probe generates its voltage via a chemical reaction a bit like a battery. When the gases flow over it the oxygen in the gas causes a chemical reaction in the sensor and it generates a small voltage.
At idle or cruise the ideal mixture is 14.7:1 AFR which causes the lambda to generate 1.0V lambda.

As you drive harder the car richen up and the voltage decreases due to less oxygen content.
So in theory if both lambda probes wideband and narrow band generate 1V at 14.7 then both will reduce in voltage, so not a problem.
However after a quick Google i expect the wideband may produce 2.5v at 14.7, which may not be a problem for the ECU but the Software will need rescaling. Maybe it provides a narrowband/wideband soft switch
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