Oxygen Sensor: Testing and Inspection

INSPECTION

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:
Bank 1 Sensor 1: 11 - 16 ohms at 20°C (68°F)
Bank 1 Sensor 2: 11 - 16 ohms at 20°C (68°F)

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