Where is main sensor for 2000 ford expedition
What the heck is a main sensor?
Where is the oxygen sensor for 2000 Ford expedition
There are probably up to 4 of them. They are located in the exhaust piping starting just past where the exhaust pipe connects to the exhaust manifold (one on each side). There may also be 1 or 2 just after the catalytic converters. What problem are you having?
I got this fromANOTHER POST> There are (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.