Diagnostic Overview
MaxxForce fault code 353 is listed in the turbo group, but the entry is not complete enough to identify a single component. It may relate to boost pressure, turbo control, or another air-management input depending on engine calibration. The safest diagnostic approach is to verify the complete code description and use live data to determine whether the truck has a boost, sensor, actuator, or exhaust-flow problem.
Likely Causes
Faulty boost sensor, turbo actuator problem, charge-air cooler leak, exhaust leak, intake restriction, wiring fault, or mechanical turbocharger issue.
What To Check First
Retrieve the exact description, compare commanded versus actual boost, pressure-test the charge-air system, inspect turbo actuator movement, and check exhaust leaks before the turbo.