Oxygen Sensor: Testing and Inspection

INSPECTION
(Bank 1 Sensor 1, Bank 1 Sensor 2)
INSPECT HEATER RESISTANCE OF HEATED OXYGEN SENSORS

1. DIsconnect the heated oxygen sensor connector.

Sensor No.1:

Sensor No.2:

2. 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 2 Sensor 2: 11 - 16 ohms

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