Last weekend, I got the old Heathkit VTVM (high impedance analog voltmeter)
out and put one probe on the spade lug at the end of the sensor cable and
the other problem on the A/C compressor.  I got about +0.47 volts with a
very steady reading.  Engine was fully warmed up and idling about 1000 rpm.
Ambient air temp was about 65 deg. F.

Do I need a new O2 sensor?

John Lauterbach
Macon, GA
'84 7-passenger