Diagnostic Overview
MaxxForce fault code 3567 is listed as a derate-related entry in the supplied list. On International/MaxxForce applications, derate codes are often not the original failure; they usually indicate that the ECM is reducing power because another monitored engine or aftertreatment condition has not been corrected. The exact meaning depends on engine family and calibration, so the full diagnostic report should be reviewed before replacing parts.
Likely Causes
Unresolved aftertreatment fault, low fuel pressure, sensor fault, SCR/DEF fault, DPF restriction, EGR fault, turbo fault, or engine protection condition.
What To Check First
Look for companion active codes, identify the first code that set, check aftertreatment and fuel system data, and verify whether the truck is in warning, torque derate, or speed-limited inducement.