Oxygen Sensor

Operating voltage range [1] 0.3 to 1.0 Volts
Voltage fluctuates [2] More than 5 times in 10 seconds
O2 Heater Resistance [3] 3 to 1000 Ohms

[1] Engine at operating temperature.
[2] Maintaining engine speed at 2000 RPM.
[3] Measured between terminals a and c of sensor connector.