F 150 2WD Pickup V8-4.6L SOHC VIN W (1998)
Oxygen Sensor: Service and Repair
Upstream
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.
1. Turn the ignition switch OFF.
2. Disconnect the connector.
3. Raise and support the vehicle.
4. Use Oxygen Sensor Wrench to remove the Heated Oxygen Sensor (HO2S).
INSTALLATION
1. Follow the removal procedure in reverse order.
