2011 Cummins ISX15 engine derated

[Ted Fisher]

I'm 33 I've been a mechanic all of my adult life. I graduated from NADC and I'm the mechanic for a small grading company. I have not had to deal with def or egr systems on diesels so I'm trying to self educate. One question is what do I need to be able to scan a 2011 ISX15, my snap on prolink will not cover this truck. And the engine is derated right now but the driver said he only dropped one gear pulling up the mountain. Would it make it to the KW dealer about an hour and a half away? The truck is saying "exhaust (SCR/DEF) service required." Thank you in advance for any help.