how critical are the codes u0001, u0140, p1daf, u0121 in the 2014 jeep cherokee?

Question

the codes are listed, what do they mean?

Answer 1

U0001 High speed CAN communication

U0140 Lost communication with body control module (TIPM)

U0121 Lost communication with Electronic brake control module

The ABS system is off, to get to the issue the "P" codes should also be included, and that should be diagnosed first before the communication problem can be addressed