codes 141, 440, and 446? on 2001 Lexus IS300

need help fixing these codes cant pass inspection to save my life!!!

Asked by for the 2001 Lexus IS300
1 answer 1 comment
see a mech as these are not diy repairs and can be tricky at times
Expensive as well? I was hoping to take care of the O2 sensor my self. Can you tell me what each code means, as far as the problem it represents? TIA