O2 sensors which side is bank1 & which is bank 2

Here's a link to your firing order,cylinder 1 is bank 1. Specifications Firing Order AutoZone com

bank 1 is the side that cylinder #1 is on then if you follow the exhaust back from the manifold the first sensor is bank1 sensor1, continue along the exhaust until you come to the 2nd sensor this is bank1 sensor2.

Forget to write it down?

Generic or Manufacturer?

There are 41 Generic O2 Codes

PO 131--bank 1 sensor 1
PO 137--bank1 sensor 2
PO 143--bank1 sensor 3
PO 151--bank2 sensor 1
PO 157--bank1 sensor2
PO 163--bank2 sensor 3

your truck should have four o2 sensors bank 1 sensor 1 is o2 sensor on cylinder 1 side before cat and bank1 sensor2 two is 02 sensor after cat banks 2 sensor1 is on other side berfore cat and bank2 sensor2 is after cat hope that helps when they read code it should tell you bank1 sensor1 or2 good luck

this is how it goes, this car all depending on the engine size can have 2 or3 or 4 sensors,

sensors are labeled bank 1 sensor 1 or bank 1 sensor 2 and then bank 2 sensor 1 or bank 2 sensor 2.

sensor 1 on either bank is the front sensor before converter closest to engine.
sensor 2 either bank would be the rear sensors after the converter.
bank means which side of the engine,

bank 1 is the side in which the # 1 cylinder is on,
For example a 4 cylinder engine would have the bank1 sensor 1 on the top of the exhaust before the converter and bank1 sensor 2 would be down on the exhaust after converter. it may not have a bank 2. but newer 4cyl are starting to have bank 2

A v-6 engine would have 4 o2 sensors with same concept except one on each side of engine and then one at rear unless using two converters then one after each converter.

if you do not understand this then tell me year,make model and engine size and the complete code like bank 1 senser1 and i will tell you exactly where it is. good day.

Bank refers to the side of the engine. Bank1 is always the same side as the number one cylinder. Bank 2 is always the other side of the motor on a v-6 or v-8

Sensor refers to before or after the catalytic converter. Sensor 1 is always before the cat. sensor 2 is always after the cat.

Bank1 sensor 1 on your vehicle - since the number one cylinder is on the backside of the motor closest to the firewall the B1S1 - O2 would be in the exhaust manifold on the back side of the engine before the catalytic converter.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

On all cars, the bank 1 is where the first piston is...Your firing order on that car which is the first piston...Buy a chilton or a repair manual for your car and it will tell you which firing order your motor has....Its usually on the right hand side...Passenger side...Rule of thumb if you look at the spark plugs the one closest too you is usually the first piston....Bank 1 is located on the same side as the first piston...I hope this helps...

Bank 1 is always the same side of the motor as the number one cylinder. Bank two is the other side.

Sensor 1 is always before the cat. Sensor 2 is always after the cat.

Since that year only has one O2 before the cat it would be called bank1 sensor 1. It is located before the cat in the exhaust manifold on the back side of the engine (firewall side).

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Hi, There are 4 sensors, 2 pre catalytic converter, 2 post. The driver side is bank 1, and the passenger side is bank 2 .The foreward one in the pipe coming from the driver side is bank1 sensor 1, the rear sensor for the driver side is bank 1 sensor 2 . The other side would be the same, but bank 2. Good luck...

I do not have a diagram but, bank 1 is the bank where #1 cylinder is at. other side would be bank #2. so bank #1 o2 sensor is just before convertor.