looks like something went bad

the O2 reading 0.00 volts at idle (randomly hits 0.00) in Closed loop and has a stoner code p0420
Long Term fuel trims when the code was stored was +32% on both banks

it's on the AFM bank on cylinders


sensor #2 is NOT tracking sensor 1 on both banks


Bank 1 sensor 1 shows 0.00 volts @ idle and gives a P0420 Code
bank 2 sensor 1 show 0.05 volts @ idle



sensor 1 = pre cat
sensor 2 = post cat


the cat temperature is fine 480-550C and is tracking the throttle/fuel input like it should... sometimes the engine will stumble because of it at idle