Front and Rear Heated Oxygen Sensor Heaters

1. Ensure ignition switch is OFF.
2. Disconnect heated oxygen sensor connector.
3. Connect ohmmeter between terminals 1 and 3 and measure resistance.

Specification: Approx. 2 - 4 ohms (68 °F {20 °C})

4. If not as specified, replace heated oxygen sensor.

Tightening Torque: 22 - 36 lb-ft (30 - 49 N.m, 3 - 5 kg-m)

5. Reconnect heated oxygen sensor connector.