Heated Oxygen Sensor (HO2S)

HEATED OXYGEN SENSOR (HO2S)

5.4L Shown, 6.8L Similar:

Exploded View

Socket, Exhaust Gas Oxygen Sensor:

Special Tool(s)

Removal

WARNING: The normal operating temperature of the exhaust system is very high. Never attempt to service any part of the system until it has cooled. Be especially careful when working around the three-way catalytic converter. The temperature of the three-way catalytic converter rises to a high level after only a few minutes of engine operation. Failure to follow these instructions may result in personal injury.

1. With the vehicle in NEUTRAL, position it on a hoist.
2. Disconnect the battery ground cable.
3. Disconnect the heated oxygen sensor (HO2S) electrical connector.







4. Using the special tool, remove the HO2S.
- Apply penetrating lubricant to the HO2S to assist in removal.

Installation







1. Using the special tool, install the HO2S.
- To install, tighten to 46 Nm (34 lb-ft).
- Apply a light coat of high temperature nickel anti-seize lubricant to the HO2S threads prior to installation.

2. Connect the HO2S electrical connector.
3. Connect the battery ground cable.