2002 dodge dakota o2 sensor questions

What motor is in the truck? If you got someone to pull the code it should have told them. Sensor one would be before the cat. converter and sensor two would be after it. That if your truck is federal emissions. if its calfifornia emissions then it will have 4 o2 sensors.

theres actually 3 if i remember correctly. theres one for each manifold, to measure each bank, and then theres one after the cat. Bank 1 sensor one is the driver side, before the cat Bank 2 sensor1 is the passenger side before the cat. if the code comes back as a "sensor 2" its the one after the cat. "sensor 1" is always pre cat. "sensor 2" is always post cat.

Thank you so much! Ive got the part and its going in today along with an oil change.