[ron1004]

My car scans a P0154 on the O2DB

So it looks like the O2 Sensor in Bank 2, Sensor 1 is not reading. I hope that's why my exhaust smells like crap.

So I went out and bought this guy: Amazon.com: NGK 25158 Oxygen Sensor - NGK/NTK Packaging: Automotive
And bought this guy to help take it out: Amazon.com: Powerbuilt 648691 Oxygen Sensor Offset Puller: Automotive

I was wondering if I highlighted the right one. I read that Bank 2 is driver side, and Sensor 1 means the front.

Below is the driver side, but it's pretty close to the firewall and far back. I looked around some more, but it's the only one I could find. Do you guys know if this is the right one?

This might not be a faulty O2 sensor - the high voltage signal indicates a very rich mixture, which could be a stuck injector, and the sulphur smelling exhaust is another indication that you have a lot of unburnt fuel reacting with the CAT.
What's the mileage - a compression test might be good, seeing as the fuel might not be igniting in one cylinder due to insufficient compression.

To confirm the ID of the sensor you could disconnect each one in turn and check the response on the OBDII scanner, but below is a description.

P0152 02 Sensor Circuit High Voltage (Bank 2 Sensor 1)

A P0152 code refers to the Bank 2, sensor 1, o2 sensor. (Bank 1 would contain cylinder 1 and bank 2 is the opposite bank. Bank 2 doesn't necessarily contain cylinder 2.) "Bank 2" refers to the side of the exhaust that DOES NOT contain cylinder number 1 and "Sensor 1" indicates that it is the pre-cat sensor, or forward(first) sensor on that bank.