Ok I have a 2010 Nissan Moreno and that po420 came on and I tried the cataclean stuff the part store recommended but cleared the code and came back on. Can you take a converter off a 2008 Nissan Versa hatchback that I have that has a blown tranny and use that converter and put on my Moreno?
That definitely wouldn’t be the same converter so no it wouldn’t work
You may want to try getting one from a place like Rock Auto, they often times will be much cheaper, but will work without throwing codes.