from what i read about it but not 100% sure, u will end up changing ur o2 sensor either way u will have to change it soon or later if u havent, and the catalyst converted is most likely good cause what usually happens is if u drive the car for a longggg time with the 02 sensors bad then the catalyst converted will get fuk.
oem o2 sensors lifetime warranty from autozone goes under $200 for the most expensive one, and is soooo damn easy to change them i regret paying. but then again i am a noob