oxy sensor counter

[Dylan Jenkins <dylan@vt.edu>]

Hello all,
The oxy sensor light on my 85 4kqs is on (I'm fairly certain it's from the
internal counter, car has 121k miles, light came on at 120k). Bentley says
stick a screw driver in a hole in the back of instrument panel and push
lever towards back of car to reset oxy sensor counter. I did this, and the
oxy sensor light went off for a day, or approx. 40 miles, then came back on.
It's pretty difficult to tell how far back to push this lever thing,
especially without being able to see in there; tried looking through
windshield, but couldn't see down into lever hole. Does anyone have
experience with these things? Should I be listening for a click or something?

Thanks,
Dylan.