Navistar MaxxForce DT Diagnostic Manual page 116

DIAGNOSTIC MANUAL
Step
17 Verify root cause of frequent regens symptom.
Has root cause for frequent regens been diagnosed and
repaired?
112
Action
https://www.truck-manuals.net/
Decision
Yes: Diagnostics complete
No: Go back to step 1 of Engine and
Aftertreatment System Operational
Checks page 80 to verify engine systems
are in satisfactory condition.