Hello, I didn't find a thread for Pacifica so dropping this post here.
My 06 Pacifica lost power while driving. We were getting on the highway and the car lost power and would hardly move. It won't rev above 1500 rpm. The air cleaner is new, the oil was changed a week ago. Motor oil and tranny oil look and smell ok to me. I thought maybe the catalytic converter was plugged, but exhaust flow seems normal. I took it to O'Rielly Auto Parts and they scanned it for me, said it needed an o2 sensor. I bought it, installed it, made no difference. Help from the Dodge experts please.

Nowhereman

 

not sure but heard to stick with o2 sensors that manufactores use.
did you reset the battery for a while to clear codes and re learn?

 

Don't worry about being in this section. Everyone is here to help, This forum does have a sister forum for the chrysler products. If you need that information just send me a pm. I would remove all the sensor and start the engine and see if there is any changes. If it runs better. Then you maybe right about the cats.