David, I really like that oxygen battery description of what the O2 sensor system does.  I have a "working knowledge" of the sensor, but between Dennis's description and yours, I have a much more graphic idea of how that works.
Dave B.

-----Original Message-----
From: David Beierl <dbeierl@GMAIL.COM>
To: vanagon@GERRY.VANAGON.COM
Sent: Thu, Apr 16, 2020 6:38 pm
Subject: Re: AFM failure

>
> The sensor is a bit of magic and should probably be called an oxygen
> deficiency sensor! This thought is based on the voltage being produced by
> the difference in the O2 level in the exhaust and atmosphere.

It's literally an oxygen battery.

Yrs,
d

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