International: improved engine recalibration for certain bus and truck models built with maxxforce 7 engines

Bulletin number

AFC-09909

Component

Engine and engine cooling: engine: diesel

Summary

International: improved engine recalibration for certain bus and truck models built with maxxforce 7 engines. Excessive regeneration due to certain unique driving conditions may result in fuel dilution in the target vehicles. The software upgrade maximizes engine exhaust outlet temperature during regeneration at low engine speed and low load, leading to improved regeneration effectiveness, thus preventing excessive regeneration and fuel dilution. Models 3200, 4100, 4200, 4300, be c bus, be s bus, ce c bus, ce s bus, hc c bus and rxt (10/1/06-8/25/09).

Owners of these vehicles have filed 4 complaints in the engine category.