GMC Repair: bank 1 and bak 2 oxygen sensors, oxygen sensors, autozone

Question
ok i went to autozone and check why my engie light was on and there were two codes they were p0172 system to rich (bank 1) and p0175 system to rich (bank 2) so i checked it out and they were both oxygen sensors so i would like to know were these oxygen sesors are located at. thank you

Answer
Hi
Bank 1 is left side (drivers side)
Bank 2 is right side (passenger side)
You must also remember Rich condition MAY not be caused by oxygen sensors. They MAY just be reading a rich exhaust condition.
Rich = too much fuel OR not enough air.
plugged air filter. faulty pressure regulator. Fuel pump too strong. Bad plugs.
JUST advice from experience.
I hope this helps
Good Luck
Pawl