what does the codes tell

What does the following codes tell and what is the solution? Really appreciate your feedbacks.

1. Trouble code - P0335

Description - use CPS circuit Fault

State - Continuos Memory Dtc

2. Trouble code - P0172

Description - system too rich (bank 1)

State - Continuos memory Dtc

3. Trouble code- U0073

Description - Control module communication Bus off

State - Continuos memory Etc.