Data Link and Coolant fault codes but no light on dash?

Hey guys, my keeptruckin eld just got plugged into my 2006 Freightliner CST120 Detroit 60 12.7L engine, and at first it gave a fault code for what I assumed was low coolant because the coolant was actually low.
Last week I added coolant and drove around for Bout an hour and the fault code remained but also when I started the truck this time I got 2 more fault codes referencing my data link. Can anyone tell me what's the issue and how to resolve?

Here's the actual fault codes showing on my eld:
PID-111 1 Coolant Level Intermittent
SPN-111 1 Engine Coolant Level 1 Intermittent
SID-231 12 SAE J1939 Data Link Intermittent
SPN-639 12 J1939 Network #1, Primary Vehicle Network Intermittent