1999 Dodge Durango 5.2L P0132 code

Ok, first off, thanks for any help.
I recently got a p0132 code and tried trouble shooting it I know its the (Circuit High Voltage (Bank1, Sensor1)), used a scan tool. First off where is the front )2 sensor on Bank 1?
I reset the PCM and the code comes back right away.
A little history, I just came back last week from a 300 mile trip with no problems. I changed the tranny filter before i left and added a trans cooler. no problems (except for a leak on the gasket and replaced the gasket when i returned). I cleaned the sensor at the tranny, checked the O2 fuse and its good.
The Durango idles great. Its when I get to about 2000 PMs and it shifts gears it bogs and feels like its lost powere, I feather it and it goes but if I give it alot of gas it feels likes its starving and then eventually goes. It never dies. Comes to an idle fine. Takes off again fine and the n starts all over with the bogging?

The Durango has 140,000 miles on it and runs great. I know theres going to be problems but it seems like this came on after a simple trip to the hardware store, lunch then on way home it happened (about a total of 10 min. driving).

Also, I hear a small clnaking which i think is inside the muffler. (prob. worn out). When I first start the durango, I noticed condensation at the muffler and sure enough, theres a pinhole at the rear of the muffler thats leaking condensation!

1999 Dodge Durango
5.2L
140,000+miles

FIXED I HOPE!!!
Ok, found the "before O2 sensor" (just didnt look hard enough, would have bit me in the neck if it was a snake!) changed it out, 67.00 at Autzone with an OE Bosh one and asked the guy if I can return it if it does not fix the problem and the dealer says Its no good and he said "yea I guess" I guess thats what you get for the money you pay parts lk up guys!.
Anyways, installed and cleared the code and drove it around a bit. Drove fine now!
Lucked out so far and got off cheap. Now to fix the muffler!

Hope this helps out anyone.

So you had an issue with the Bosch?

No, I didnt but I read a thread where someone else had a problem and had to take it to the dealer to replace O2 sensors and the dealer said the Bosch werent working and had to put theirs in? they charge him like 800.00!!! rediculous.
My Bosch seem to work fine.