Oxygen Sensor: Testing and Inspection

INSPECTION
(Bank 1 Sensor 1, Bank 1 Sensor 2)

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





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

Resistance:
At 20° C (68° F):
Bank 1 Sensor 1:11 - 16 Ohms
Bank 1 Sensor 2:11 - 16 Ohms

If resistance is not as specified, replace the heated oxygen sensor.
(c) Reconnect the heated oxygen sensor connector.