[kilrein]

Hello all, first time here.
My daughter's 2003 truck is throwing the following codes:

PO300
U1255
U1000
C0300
CO3005
CO306
CO321
CO327
CO359
CO374
CO379

I'm not a mechanic, I know how to do basic maintenance but I've been in IT for years and the code structure leads me to think that it's a control module issue but not sure which one and would like to get your thoughts?

thanks

Paul

 

[kilrein]

No, transfer case has never been replaced.

Paul