O2 sensor damage?

[bcroe at juno.com]

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.

Bruce Roe

On Sat, 16 Feb 2002 12:43:07 -0500 Brian <brian at pop.net> writes:
> Hello,
>    I have built the Wideband O2 circuit ... and I was reading at :
> 
> http://www.aces.edu/~gparmer/efi/temp/wb/guide.html#dvm
> 
> 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."
> 
> Is this accurate?  How does this sensor survive in a Honda? 
> Is it heated all the time?  I'm trying to troubleshoot my circuit 
> and I'm sure that it's been in the exhaust with the LED off 
> before... so is it screwed up now?
> 
> Thanks a lot!  This is a fun project (but I'd like to see mine 
> working!)
> 
> Brian Davies

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