Q&A

 Master

The only circuit on the O2 sensor that you will measure resistance on are the two heater element wires going from the connector through the sensor with the connector disconnected. Brown/black and red/green supply power and ground through the harness to the sensor, I think the wires at the sensor are both white at the sensor end. They are a heater element so all you are looking for is continuity or the heater circuit is burned out (resistance will be a few Ohms).
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