Which oxygen sensor? There are two of them. They each have 4 wires and each wire has two colors. There were two models of the f250 also, need to know engine size. Sorry.
On my 1989 f250 the oxygen sensor is in the exhaust header pipe a few inches in front of the catalytic convertor
Diesels do not use oxygen sensors
On the exhaust pipe between the engine and the catalytic converter
What position is the crank sensor on a f250 ford pickup
Where is cylinder temp sensor on 2000 Ford f250 with v10 engine
where is a cam sensor on a 2006 ford f250 6.0L diesel engine?
Where are the Bank 1 Sensor 1 oxygen sensor on a 1998 ford explorer?
passanger side of water pump
The 1981 Ford Crown Victoria does not have an Oxygen sensor.
Under the intake.
pump housing front top of engine
on the down pipe under the truck unplug the wire unscrew it screw in the new one with thread sealent plug in the wires Rooterman2