Asliden2J

I currently have a code P0420x2 and with the check engine light on my dash, my traction control off was blinkin a steady amount in like 30 second increments. I was told when that happens its usually refers to a bad o2 sensor. I was just wondering if there is confirmation on that or am I looking at multiple problems?

What front bumber and grille is that? Info would be appreciated