Oxygen Sensor I believe there are actually (4) O2 sensors on your truck. If you look inside the wheel wells behind the fender liner, right about where the frame is one O2 sensor, the other is underneath the truck about half way back in relation to the transmission. If you see where the exhaust joints together, you went about 6" too far.
When you start looking at the O2 sensors, they are normally numbered something like "Bank 1 Sensor 1" Bank 1 is on the passenger side; Bank 2 is on the driver's side. Sensor 1 is the upstream sensor (near the frame, between the block and the cat) and Sensor 2 is near the Y-pipe (downstream of the cat).
Normally it is the upstream sensors (sensor 1) that go first. They see the harshest conditions. You will need; Oxygen Sensor Socket Anti-Seized Penetrating Oil Sometimes it will take 15 minutes or take a few hours it depends on your luck...
4
There are 4 oxygen sensors on the 2001 ford f150 v6.
1
how many oxgen sensors on a 1995 millenia
My 1995 Ford Explorer with 4.0 L OHV has 2 oxygen sensors (Helpfull)
two
One
two
there should be 4 two are pre cat and two are post cat
2
any car after 1995 has two, or four oxygen sensors,as they use OBDII system
On a 1995 Ford Explorer : There are ( 2 ) oxygen sensors ( I believe there is one sensor in the outlet of each exhaust manifold )