Crown Victoria V8-4.6L CNG SOHC VIN 9 (1999)
Oxygen Sensor: Service and Repair
Rear
EGO Sensor Wrench
Special Tool(s)
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. 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 from the rear Heated Oxygen Sensor (HO2S).
4. Remove the rear heated oxygen sensor.
INSTALLATION