Need help with 6.0 codes

[weekendwarriorfsw32]

Got a marine buddy's 6.0 that's dead on base and died while driving. Been though all the basics but he got codes pulled and they are all U codes, any one have a DTC sheet in front of them to hard to google all these codes while driving home from SEMA. U0420 U0423 U0634 U2205 if I remember right they a communication errors but I'm not positive
Thanks in advance

 

[ThreeFitty]

Yes all U codes are communication errors

U0420 is Invalid Data Received from power steering control module
U0423 Invalid Data Received From Instrument Panel Cluster Control Module

Can't find last 2

 

[swinky]

Got a marine buddy's 6.0 that's dead on base and died while driving. Been though all the basics but he got codes pulled and they are all U codes, any one have a DTC sheet in front of them to hard to google all these codes while driving home from SEMA. U0420 U0423 U0634 U2205 if I remember right they a communication errors but I'm not positive
Thanks in advance

Stationed in nv I guess?

 

[weekendwarriorfsw32]

He's out of camp pendleton in California. So for the codes those are
Nothing that would make it not start
Then, starting to lean towards the stc fitting

 

[ThreeFitty]

No none of those cause should cause a no start