Trying to change the O2 sensor.  It is under the passenger seat, in the exhaust
pipe, pointing up.
I have the special O2 sensor socket and can get it over the sensor.  But the top
of the socket is up in the shaft hump next to the shaft and I can't get the 1/4"
drive socket wrench in the socket.  Tried turning the O2 socket  with an open
end wrench but that didn't work.  Tried putting a crescent wrench on the O2
sensor and tapping the crescent with a hammer but that didn't work.

Any suggestions?

Thanks,
Jim