Where is the position 1 bank one oxygen sensor on a 2001 eclipse V6?
position 1 bank 1 would be on the header where cylinder number 1 is located. you can work your way back from there position 1 bank 2 would be the opposite exhaust manifold, followed by position 2 bank 1 would be the pre catalytic converter sensor, and position 3 bank 1 would be post catalytic converter.