DIY-WB... It's alive...

[Bob Wooten]

If I am not mistaken an O2 sensor is a voltage generating device.  this is
why you can "test" them with a meter & not have an ECM connected to them
(the standard zirconium switch types, I am still out in the weeds on the ION
pump, WB type).  My understanding is also that this is part of the reason
why they fail.

BW


>
> The general consensus has been that the ECM applies the bias. I have
> not found any evidence of this. Maybe some ECM's do. My belief is
> that the sensor that generates this voltage.
>
> BobR.
>

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