Oxygen Sensor: Testing and Inspection

INSPECT HEATER RESISTANCE OF HEATED OXYGEN SENSORS.
1. Disconnect the heated oxygen sensor connector.








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

Resistance: At 2O°C (68°F): 11 - 16 Ohms

- If resistance is not as specified, replace the heated oxygen sensor.
3. Reconnect the heated oxygen sensor connector.