Tired exhaust and very sporadic O2 OBD codes... replace cat? Topic is solved

[theWIFES_S70]

Finally got around to getting my exhaust taken care of. $100 bucks to weld in a piece of pipe. (Junk yards around Shea Stadium in Corona, Queens. A meineke in New Rochelle wanted no part of my business earlier in the day...) Car feels normal again. Whew... Yeah, I overpaid. But I wanted to hurry up and see my nephews!

Some observations:
- I have a Volvo muffler! Still feels pretty solid. (Wonder if it's a replacement.)
- I drove around 80 mostly city miles in a few days and got around 9 mpg...
- Going to replace my O2 sensors as a preventive measure.
- She keeps on ticking!

[Rattnalle]

The original factory mufflers last this long as a rule even in our corrosive climate over here.

[brunocerous]

Where was the break? Between cat and muffler?