There is no physical connection between the light and the engine. It is
not a read-out warning light from the O2 sensor. It does signify that
that life limit of the O2 sensor is at hand and it should be changed.
The light is acutally triggered by a gear in a little black box mounted
just above the spare tire. Same box the speedometer cable is connected
to. On top of the box is a detent with a button in it. When you change
the O2 sensor,  you are supposed to reach up in there with a small
screwdriver or other pointy object and press the button. This resets the
counter for the next period until it's time to change the O2 sensor again.

John Rodgers
88 GL Driver

Paul Rogers wrote:
> Hey Volks,
> I went on a camping trip this weekend and somewhere along the way the oxygen
> sensor light came on. Engine seemed to be unaffected by this, thank God. I
> checked the connection and everything appeared to be normal. What does the
> light staying on indicate is going on? Should I try putting a new sensor in
> first? Any input will be greatly appreciated.
> TIA,
> Pablo
> 85 WWW "el Lobito"
> Danville, CA
>