It would be mounted in the exhaust pipe downstream of the catalytic convertor Helpfull
My Chilton repair manual engine wiring schematic, for the 1996 Ford Explorer with a 4.0 L OHV engine shows 3 . Two are upstream (before the catalytic convertor) and one downstream (after the catalytic convertor - which is an oxygen sensor but is used to monitor the efficiency of the catalytic convertor)
There are 2. One in front of catalytic convertor and one behind the catalytic convertor.
On the 3.0 L and 4.0 L there are 2 oxygen sensors at the front and 1 oxygen sensor (which monitors your catalytic convertor efficiency) at the back after the exhaust gasses have passed through the convertor. On the four cylinder engine - 1 oxygen sensor at the front - 1 oxygen sensor at the back (downstream of catalytic convertor - monitors catalytic convertor efficiency) Helpfull
No, it must be replaced.
No
After the catalytic convertor. Sensor one is before the convertor.
the catalytic convertor
The 2005 Ford Expedition 5.41 has two Oxygen Sensors that might need to be replaced at the same time. One is located in on the motor near the front of the catalytic convertor. The other O2 sensor is located behind the catalytic convertor. To change them, it is possible to manipulate the clips holding them in and remove them, then put the new ones in.
there should be 2, 1 up-stream from the catalytic convertor and 1 down-stream on the ehaust manifold
Catalytic Convertor
On my 1989 f250 the oxygen sensor is in the exhaust header pipe a few inches in front of the catalytic convertor