Oxygen Sensor: Testing and Inspection

HEATED OXYGEN SENSOR (Sensor-1 and Sensor-2)




Oxygen Sensor Heater Inspection
1. Disconnect sensor coupler.
2. Using ohmmeter, measure resistance between terminals "VB" and "GND" of sensor coupler.

NOTE: Temperature of sensor affects resistance value largely. Make sure that sensor heater is at correct temperature.

Resistance of oxygen sensor heater:
11.7 - 14.3 ohms at 20 °C, 68 °F

If found faulty, replace oxygen sensor.

3. Connect sensor coupler securely.