Oxygen Sensor: Testing and Inspection

INSPECT HEATER RESISTANCE OF HEATED OXYGEN SENSORS.
(Bank 1, Sensor 1, Bank 1 Sensor 2)
- Disconnect the oxygen sensor connector.





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

Resistance at 20°C (68°F):
With M/T Bank 1 Sensor 1 5 - 7 Ohms
Others 11 - 16 Ohms

- If the resistance is not as specified, replace the sensor.

Torque: 20 Nm (14 ft lb)

- Reconnect the oxygen sensor connector.