What's happening with my 2006 Nissan Titan?

Question

I have a 2006 Nissan Titan. I had Auto Zone check the code and the following codes appeared:

U1000 - Controller Area Network Communications Circuit
P1564 - Automatic Speed Control Device Switch
P0430 - Catalyst System Efficiency Below Threshold Bank 2
P1705 - Transmission Control Module Read Only Memory Assembly

I have had bother catalytic converters replace 1.5 years back and the ECM relay replace 2-3 years back.

What could cause these codes to show now?