I have a 99 f150 w/ the v6. You actually have 4 o2 sensors. 2 upstream of the cats and 2 down stream of the cats
The diesel has two. Sensor one is closer to the engine.
The second sensor is underneath the car on the exhaust front pipe, as opposed to the irst one which you can see plugged into the Cat when you lift the bonnet.
There are two sensors in the exhaust system and both are located underneath the car. One upstream sensor that is before the catalytic converter (sensor 1, closest to the manifold) and one downstream of the converter (sensor 2). On a diagnostic tester, the code will come up Bank1 Sensor One or Bank1 Sensor Two. There is only one bank and two sensors. Once the sensor has been replaced, disconnect the negative battery terminal for about one minute and reconnect it. If the sensor replaced is installed correctly, the check engine light should go out and remain off.
You can find it in the exhaust manifold, it's visible from the engine compartment. Basically it's between the engine radiator.
Back of the engine, in the exhaust above the catalytic converter.
Sensor 2 is the downstream sensor (after the catalytic converter). Bank 1 is the drivers side of the engine
Bank 1 should be the side of the engine cylinder #1 is on.
Just locate the connector with the white cable, in the front of the Engine and it lead you to the oxygen sensor. It has to be attached to the Pre- Cat
Bank1 is the driver side of the engine, senor 1 is on the engine side of the catalytic converter in the exhaust flow.
It depends on which sensor, O2/camshaft,etc. The O2 sensor is a straight metal sensor that is screwed into the exhaust. There is an upstream/bank1-sensor1 or down stream/bank1-sensor2 after the catalytic converter. A camshaft sensor is an L shaped, usually black sensor that is installed into the head closest to the firewall(bank1).
the oxygen sensor(s) on any car is gonna be screwed in the exhaust. the primary sensors are screwed in the exhaust manifolds. the secondary sensors are going to be screwed right before, in, or right after the catalytic converters. if your getting a check engine light, find out what code is in the computer and the definition. b1s1 means bank 1, sensor 1. bank1(or2) means which exhaust side, and sensor1(or 2) is the location of the sensor on that side. the side that has the number 1 spark plug is going to be bank 1.
O2 sensor circuit malfunction (bank1 sensor 2)