where is bank 1 located? where is o2 sensor 1 located?

Question

I need to know what is the specific reason why this code appeared? where is bank 1 located? where is o2 sensor 1 located?

Answer 1

P0134  02 sensor circuit no activity detected (Bank 1 sensor 1)

Deteriorated 02 sensor, Low fuel pressure,(at idle fuel pressure should be 47-50 psi ).For the location 02 sensor 1 , Bank 1 is where cylinder number 1 is located sensor 1 is before the catalytic