O2 sensor damage?

Gregory A. Parmer gparmer at acesag.auburn.edu
Wed Feb 27 06:20:36 GMT 2002


So the light may drop out and come back on?  I'll add any details
you can provide to the assembly guide. The more complete our
info the better.

FWIW--mine comes on bright, then dims a bit. The voltage across the
LED seems to oscillate (faster than a DVM can display). I'm measuring
at the tailpipe with the Dataq DI-194--neither of which may be considered
optimal. Readings imply correct function though.

-greg

On Wed, 20 Feb 2002 bcroe at juno.com wrote:
> If you have warmed up the sensor enough to turn on the LED, you
> are in good shape.  A slight drop in voltage (below 13.5V) may
> caues the LED to drop out momentarily, but power is still applied
> to the sensor heater.  No damage done.
>
> On the other hand, a complete loss of power to the sensor heater
> means it should be removed, before damage accumulates.
> >
> > and it says there:   "If the LED goes out for any reason,
> > immediately remove the sensor from the exhaust stream.
> > The LED indicates the heater is still warmed and active, a
> > requirement to prevent damage to the sensor."

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