Flash: 6.4L Powertrain Diagnostic And System Enhancements
This bulletin involves reprogramming the Powertrain Control Module with the latest
available software.
A small number of customers may experience a slight spark knock condition during
aggressive high speed driving. They may state that when this occurs, the vehicle is unable
to achieve maximum top speed. No Diagnostic Trouble Codes (DTCs) are associated with
this condition.
In addition, customers may also comment that, with the cluster set on metric units, they are
unable to accurately increase or decrease the cruise control set speed using the resume or
set buttons. Instead of changing vehicle speed by 1 KPH when pressing the buttons, the
vehicle speed will increase approximately 1.6 KPH.
