Oxygen Sensor: Testing and Inspection

1. INSPECT HEATER RESISTANCE OF HEATED OXYGEN SENSORS
(BANK 1, SENSOR 1, 2)
(a) Disconnect the sensor connector.








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

Resistance: At 20°C (68°F) 11 - 16 ohm

If resistance is not as specified, replace the sensor.
(c) Reconnect the sensor connector.
2. INSPECT OPERATION OF HEATED OXYGEN SENSORS
(BANK 1, SENSOR 1, 2)