Oxygen Sensor: Testing and Inspection

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





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

Resistance: At 20°C (68°F):
Bank 1, Sensor 1: 5 - 7 Ohms
Bank 1, Sensor 2: 11 - 16 Ohms

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