p0420 on 2002 rx 300

[sa3ma4na]

I need help diagnosing what the actual culprit of the p0420 that threw up few days ago. I ran my torgue scan tool and I am adding screenshots for better understand.

I am not able to understand the various test. I need some help here.

Pic1 is the mod 6 test, pic2 is the freeze frame of the cel, pic 3 is the wave form of 02 sensor bank1 sensor 2 and the last 2 pictures are the waveform of the a/f sensors.