Don't know if it's set to come on at a certain mileage (as I recall, my
manual says it is), but check your gas mileage and look at your exhaust
pipe...if it's black, you need a replacement of the sensor. Gas mileage
gets bad, too.

----------
> From: Richard C Welsh <welshcu@PB.COM>
> To: vanagon@GERRY.VANAGON.COM
> Subject: 2.1L oxygen snsr light
> Date: Friday, February 25, 2000 11:44 AM
>
> hmmm.  my '87 2.1L's Oxygen sensor light came on yesterday@ 122,127
miles.  I
> replaced the cat and sensor a year ago @ about 108K, but didn't reset any
> mileage counter thing.  Is there such a counter?  is the light set to
come on @
> a predetermined interval (say 50K since it was last reset?) or does the
oxygen
> sensor light signal other bad things that need attention?