Expedition 4WD V8-4.6L SOHC VIN W (1999)
Oxygen Sensor: Service and Repair
Oxygen Sensor Wrench
SPECIAL SERVICE TOOLS
REMOVAL
1. Disconnect the battery ground cable.
2. Raise and support the vehicle.
WARNING: THE ELECTRICAL POWER TO THE AIR SUSPENSION SYSTEM MUST BE SHUT OFF PRIOR TO HOISTING,
JACKING OR TOWING AN AIR SUSPENSION VEHICLE. THIS CAN BE ACCOMPLISHED BY TURNING OFF THE AIR
SUSPENSION SWITCH LOCATED IN THE RH KICK PANEL AREA. FAILURE TO DO SO MAY RESULT IN UNEXPECTED
INFLATION OR DEFLATION OF THE AIR SPRINGS WHICH MAY RESULT IN SHIFTING OF THE VEHICLE DURING THESE
OPERATIONS.
3. Disconnect the electrical connector.
4. Use the special tool to remove the Heated Oxygen Sensor (HO2S).
INSTALLATION