I've been getting error codes and need to replace the O2 sensor on my 2004 Pontiac Grand Prix. It'* an FWD car with a GM 3800 series 3 engine, the sensor I need to locate is the Bank 1 Sensor 1 and from what I understand, on this type of car the Bank 1 is going to be in front of the car and I think I've located it or perhaps I've found something else. I tried to take some pics with my phone and as you can see it only has 2 leads and that has me confused. Maybe I've found something else but I haven't been able to figure out what that can be. I'd be happy to provide more and better photos. I'm just not really sure what would help but let me know and I'll do my best. I appreciate any help and answers as to what I've found and if it is an O2 sensor then why does it only have 2 leads? P.*.: I haven't yet unscrewed whatever it is I've found to confirm because I don't have the tools but I don't wanna buy the tools for something and it be wrong. As you can see, I'm driving a 2004 pontiac so I'm not rich. Thank you for everything!

Ummm . . . that looks like it is on top of the engine.

The oxygen sensors are on the exhaust pipe, one ahead of the catalytic converter and one behind it.