Heated Oxygen Sensor (HO2S)

Removal & Installation

To Remove:

1. Disconnect the negative battery cable.
2. Safely raise and support the vehicle.
3. Disconnect the heated oxygen sensor (HO2S) electrical connector.
4. Use the exhaust gas oxygen sensor socket (303-476) to remove the HO2S. If needed, lubricate the HO2S with Penetrating and Lock Lubricant #E8AZ-19A501-B or an equivalent.
5. Apply a light coating of anti-seize lubricant to the threads of the HO2S.

To Install:

1. Apply a light coating of anti-seize lubricant to the threads of the HO2S.
2. Install the HO2S using the exhaust gas oxygen sensor socket (303-476). Torque to 34 ft-lb (46 Nm).

   Exhaust gas oxygen sensor socket (303-476)

3. Safely lower the vehicle.
4. Connect the negative battery cable.