The codes my mech got were:
P0153 H02S21 Circuit Slow
P1151 H02S21 Indicates Lean
P0172 Systrm Rich Bank 1
P0174 System Lean Bank 2
P0175 System Rich Bank 2

which he figures as the Front Oxygen Sensor Bank1 Sensor 2

Thanks for help!

98.5 SE Sport Model T