Location of the bank 1 sensor 2 O2 sensor on a 2001 ford escape

Bank 1 is the cylinder bank near the firewall, Bank 2 is near the radiator.
Sept 23, 2006

Oxygen Sensor Location, Bank1 Sensor2 - Ford Taurus Forum

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There should be 3 or 4 O2 sensors in this vehicle. First you will need to find out which side of the engine the #1 cylinder is on this is bank (or side) 1. Then follow the exhaust down on the OTHER side as bank 2 is opposite of bank 1 and it will be the first one you see. Looks a bit like a spark plug in the exhaust with 4 wires coming out of it. It will be before the cat converter.

There is 4 senors the bank 1 sensor 1 is located in front of the LH (Drivers side) catalytic converter
Hope this helps

Bank 1 is located right after the catalytic converter, and it hosts cylinder numbers 1 - 3 - 5 - 9, whereas Bank 2 is on the other side, and it holds cylinder numbers 2 - 4 - 6 - 8.

is it bank 1 or bank 2.use your scanner to know with one exact need replaces they are located on the exhaust bank one is close to the engine bank 2 is alittle furthe back...
just my 2 cents

I will make this easy for you,assumming your
going to change them yourself

Bank 1 --is on the side of the engine that has cylinder #1
Bank 2-- is the opposite side
Sensor 1-- is the one closest to engine
Sensor 2 -at converter outlet,those don't fail as often

If you have a bad O2 Sensor, your going to change
both (2) Sensors FRONT 2 only
They are the 2 closest to the engine

O2 Sensors- failed or not, get changed,front 2 only
at 100,000 miles.

Diagram: Ford Explorer and V8 O2 (Oxygen) Sensor Locations

Ford Explorer and V8 O2 Sensor Locations diagram. This shows the location of Ford oxygen sensors on Bank 1 and Bank 2. If you want to know where your O2 sensors are, this diagram is your guide.



Hope helps.

Fig. Fig. 3: Oxygen sensor-4.3L engines

Fig. Fig. 4: Oxygen sensor-5.0L and 5.7L engines

Fig. Fig. 5: Oxygen sensor-7.4L engines

Oxygen sensors are always numbered like this:
Bank 1 sensor 1
Bank 2 sensor 1
Bank 1 sensor 2
Bank 2 sensor 2

Some manufacturers use a kind of shorthand that reads different, but means the same thing:
Sensor 1/1 or O2s 1/1
Sensor 2/1 or O2s 2/1
Sensor 1/2 or O2s 1/2
Sensor 2/2 or O2s 2/2

Bank 1 is always the side of the engine where cylinder number 1 is located and, of coarse, Bank 2 is the opposite side.
On a 4 cylinder engine, there is only 1 bank and it is always referred to as Bank 1.

Sensor 1 is always the upstream sensor (the one located BEFORE the catalytic converter)
Sensor 2 is always the downstream sensor (the one that is located AFTER the catalytic converter.

Hope helps (remember to rate this).

BANK ONE IS THE REAR BANK OF CYLINDERS AND TWO THE FRONT BANK