Expedition 2WD V8-281 4.6L SOHC (1998)
Oxygen Sensor: Service and Repair
Front
Oxygen Sensor Wrench
REMOVAL
CAUTION: Always disconnect the battery ground cable prior to work on the electronic controls or damage to the electronic component may occur.
1. Disconnect the battery ground cable.
2. Disconnect the two HO2S electrical connectors.
3. 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.
4. Use the Oxygen Sensor Wrench to remove the Heated Oxygen Sensors (HO2S).