Nissan General Discussion Archive
The 1320 code is for a coil. If it says Cyl. 3, replace your cyl.3 coil. Also, if you have 85k miles on your QX4, I would def. change your spark plugs too.
The P0430 code is for the catalytic converter.
If I were to assume, you have let this go for a while. Chances are you have a dead coil...