Air Fuel Ratio Sensor

INSPECT HEATER RESISTANCE OF A/F SENSORS
(Bank 1 sensor 1, Bank2 Sensor 1)




a. Disconnect the A/F sensor connector.
b. Using an ohmmeter measure the resistance between terminals +B and HT.

Resistance:
At 20 °C (68 °F) 0.8 - 1.4 Ohms
At 800 °C (1,472 °F) 1.8 - 3.2 Ohms

If the resistance is not as specified, replace the sensor.
Torque: 44 Nm (450 kg.cm, 32 ft.lb)

c. Reconnect the A/F sensor connector.