How to indentify Bank 1 and Bank 2 for O2 sensors?

[heiwaz]

Hello, How yo identfy wich is bank 1 and bank 2 in my 986s?. I have a failure in one of the O2 sensor (Bank 1, sensor 1)

[JFP in PA]

Originally Posted by heiwaz

Hello, How yo identfy wich is bank 1 and bank 2 in my 986s?. I have a failure in one of the O2 sensor (Bank 1, sensor 1)

Bank 1 is the side with cylinder 1:



Sensor 1 is ahead of the cat, 2 is behind the cat.

[heiwaz]

Originally Posted by JFP in PA

Bank 1 is the side with cylinder 1:
Sensor 1 is ahead of the cat, 2 is behind the cat.

Thank you! I was sure that cat bank 1 was the right one (cylinder 1-2-3) but I had doubt because obd2 checking also detected missfire failure in the other engine side (cylinders 4-5-6) 😕