How do you change oxygen sensors on a 1998 ford econoline E-250?

To change the oxygen sensors on a 1998 Ford Econoline E-250, first, locate the sensors; there should be one before the catalytic converter and one after. Disconnect the battery to ensure safety, then unplug the electrical connector from the sensor. Use a specialized oxygen sensor socket or a wrench to remove the old sensor, then install the new one by threading it in and tightening it securely. Finally, reconnect the electrical connector and the battery.