Oxygen Sensor: Testing and Inspection

HEATED OXYGEN SENSORS INSPECTION

INSPECT HEATER RESISTANCE OF HEATED OXYGEN SENSORS
(a) Disconnect the oxygen sensor connector.

Bank 1 Sensor 1 Heater Circuit Inspection:

Bank 1 Sensor 2 Heater Circuit Inspection:

(b) Using an ohmmeter, measure the resistance between the terminals +B and HT.

Resistance:
At 20°C (68°F):
M/T Bank 1 Sensor 1:5 - 7 ohms
Others :11 - 16 ohm

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

Torque: 20 N.m (200 kgf.cm, 14 ft.lbf)

(c) Reconnect the oxygen sensor connector.