Oxygen Sensor: Testing and Inspection

INSPECT HEATER RESISTANCE OF HEATED OXYGEN SENSORS.
- Disconnect the heated oxygen sensor connector.





- Using an ohmmeter, measure the resistance between terminals +B and HT.

Resistance at 20°C (68°F):
Bank 1 Sensor 1: 5 - 7 0hms
Bank 1 Sensor 2: 11 - 16 0hms

- If resistance is not as specified, replace the heated oxygen sensor.
- Reconnect the heated oxygen sensor connector.