Air/Fuel Ratio Sensor

AIR-FUEL RATIO (A/F) SENSOR (California)

INSPECTION

1. INSPECT HEATER RESISTANCE OF A/F SENSOR (Bank 1 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: 20 Nm (200 kg.cm, 14 ft.lb)

c. Reconnect the A/F sensor connector.

2. INSPECT OPERATION OF A/F SENSOR