I change a sensor that is in the catalac converter is that sensor 1 bank 1
Bank #1 referes to the bank with number 1 spark plug follow wire from coil (the numbers are on the coil) if you have any doubts. Sensor #1 would be the one before the catalytic converter on bank #1 and sensor #2 is the one after the catalytic converter closest to rear of vehicle.
Testimonial: "hector thank you very much this helped"
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).
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this is on a 02 dodge grand caravan 3.3L
hector i tryed to find the sensor #2 bank 1 you said it was near the rear of the car can't find it. what sensor is in the catalytic converter . do you have a print of where it might be thanks
If on the engine side of cat that's sensor #1 if in the catalyst tail end or after that's sensor 2.
HECTOR WHAT IS THE DIFFRENCE WITH BANK 1 AND BANK 2 I HEARD THAT BANK 1 IS ON THE PASSAGER SIDE AND BANK 2 IS ON THE DRIVERS SIDE IS THIS TRUE
Bank 1 has # 1 3 5 cilinders bank 2 has number 2 4 6 cilinders. So if you follow the wires from the coil and look at the numbers on the wires or coil it will point you right to the respective banks. Also if you look at the cylinder heads you'll notice one sticks out more than the other that bank one. This is a transverse mounted engine which means this engine is side ways. One bank in front the other to the firewall.
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