oxygen sensor

My check engine light popped on this weekend. I pulled the codes, and it gave me a P0133 P0133 Jeep - O2 Sensor Circuit Slow Response Bank 1 Sensor 1 I've read that this is most likely a bad O2 sensor, but could also be an exhaust leak. What do you guys think? Should I just go ahead and...

Hey all. Was hoping one of you could point me in the right direction with what part to order... Bracket and wires from center bottom of Jeep. Wires run from the cat to the o2 sensor. Looking up parts right now and I would assume that I need to replace my o2 sensor "upstream?" Please ask...