Mopar heated O2 sensor question

[Gabe]

Unless there is something I am missing, the heated O2's that I've dealt with get +12 when
the ignition is on, that's about it.

Will McGonegal wrote:

> I have a four wire heated O2 sensor from a Chrysler (p.n. 5233088).  I believe that the
> heater inside it can be powered continuously by 12 volts.  Does anyone know if this is
> not the case?  Perhaps there is a more complex scheme for regulating the sensor
> temperature that I am not aware of (e.g.. measuring current and voltage into heater,
> calculating resistance, therefore knowing the temperature).  I only have the sensor, not
> the car so I cannot monitor it while it is in use.  I'd like to put it on putting it on
> a 4-stroke ice-race bike to be sure that I'm still running rich on these cold winter
> days.
>
> Thanks for any help
>
> Will
>
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