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O2 Sensor testing tips? 850 1995

I have no 850 experience, but am used to metering 240 O2 sensors.

There is now an 850 in the family, and I'd like to know if the sensors (two?) signal can be conveniently accessed somewhere with a DVM.

The few 850 images I've seen look like a flat 3-pin plug (2 heater, 1 signal?), unlike the handy separate signal wire on the 240s and my '93 940.

Any suggestions will be much appreciated,
--
Bruce Young
'93 940-NA (current), 240s (one V8), 140s, 122s, since '63.






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