Econoline E350 1 Ton V8-5.4L CNG VIN M (1999)
Oxygen Sensor: Service and Repair
EGO Sensor Wrench
SPECIAL SERVICE TOOLS
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
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. Disconnect the battery ground cable.
2. Remove the engine cover.
3. Disconnect the connector.
4. Raise the vehicle.
5. Using the special tool, remove the Heated Oxygen Sensor (HO2S).
INSTALLATION