I have a 2002 Dodge Intrepid. At first I received the code p0441 (purge leak). I went ahead and replaced my o2 sensors with aftermarkets o2 sensors, since they were due for change anyway. Then, after checking code again, it read p0132/0152 (upstream bank 1 and 2 high voltage...). I figured I replace bank 1 and 3 upstreams with factory o2 sensors ($64.00 a piece) and have the computer flashed (reprogrammed by dealer $90.00). No codes are apearing and I have been driving over 100 miles... Perhaps this may anwer questions for others with the same problem.