Chrysler Repair: 2005 Pacifica P0132, o2 sensors, mopar parts

Question
Hello. First off I am a licenced Tech myself but I am stumped with my wifes car. 2005 Pacifica 3.5L V6. The MIL came on and it was the P0172 rich codeand I followed the diagnostic tree and found the B1S1 to be faulty. I then replaced it and after two drive cycles the MIL came on again, this time with the P0132 code. I followed the tree again and determined the new O2 was faulty and replaced again.(Both O2 sensors were Mopar parts) No more than a day later the MIL came on again with the same code along with P0172 in the history and now the vehicle intermitantly stumbles at idle and surges upon acceleration. I do not have access to the DRB3 or the tools to reprogram the PCM if that is the issue. If you could pass on some advice that would be great.

Answer
P0172-FUEL SYSTEM 1/1 RICH

POSSIBLE CAUSES
GOOD TRIP EQUAL TO ZERO
O2 SENSOR HEATER OPERATION
O2 SENSOR
EVAP PURGE SOLENOID OPERATION
O2 SIGNAL CIRCUIT
O2 RETURN CIRCUIT
MAP SENSOR OPERATION
ECT SENSOR OPERATION
ENGINE MECHANICAL PROBLEM
FUEL FILTER/PRESSURE REGULATOR
PCM

P0132-O2 SENSOR 1/1 VOLTAGE HIGH
POSSIBLE CAUSES
O2 SENSOR VOLTAGE ABOVE 3.7 VOLTS
O2 SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE
O2 SENSOR RETURN CIRCUIT SHORTED TO VOLTAGE
O2 SENSOR
O2 SENSOR SIGNAL CIRCUIT OPEN
O2 SENSOR RETURN CIRCUIT OPEN
PCM