My car misfire at 60 mph

Thank u I will do that nxt tm

Would like to help , just need more info on conditions.

The engine light is on. When I start the car it start fine. As I drive off it give a slight hesitation at about 20 mph. It drive fine at city speed but when I get on the hyway and reach around 60 mph the car starts to miss and jerk. Sometimes it shut off and I have to restart it by putting it in neutral, switching the ignition off and restarting it while it's still moving. It always restart with one swing. I took it to auto zone today and it read two codes PO442 and PO431. I change two catalytic converters and all of the injection coils and had some other work done at the mazda dealer 3 months ago. How much cat conv does this car has?