Have this code popping up for the o2 sensor, bank 2, heater circuit. I replaced the senor twice. Thinking maybe it was defective the first replacement. This is the original acura replacement. I believe this must be a wiring problem? Anyone has pointers how I can check this out? What wire color is the heating element?

There have been times when the check engine light goes away, and the code goes to pending, but usually always comes back. Sometimes it also comes back with I think its 0048 ( bank 2 cat coverter)

I checked the fuses in the small box and they were okay.

04 mdx with 95k mi.