I did get the truck repaired. Got an advance from the carrier to fix two problems. The first that caused the power issue was with the Eaton VORAD system. It had a problem and caused a link error between it and the other two computers onboard the truck.
The second problem was with a control valve that sets the pitch of the vanes in the variable-vane turbo called a V-Pod. That little gem cost me $650 to replace. So between the two issues, I racked up $1300 owed to the carrier. If I don't get recertified, I'll owe them.