Flash: 5.7L Powertrain Diagnostic And System Improvements
This bulletin involves selectively erasing and reprogramming the Powertrain Control
Module (PCM) with new software.
The following powertrain system improvements/enhancements are included in this
software release. These symptoms are broken down by vehicle.
2015 WK
? Enhancements to improve a slight lag or hesitation during Multi Displacement
System (MDS) mode transitions.
? Enhancements to improve a slight drop in engine RPM when the vehicle is shifted to
reverse or drive within 3 seconds of a cold start.
? Malfunction Indicator Lamp (MIL) illuminated with Diagnostic Trouble Code (DTC)
U0140-00 - Lost Communication with Body Control Module (BCM).
2014 WD
? Enhancements to improve a slight drop in engine RPM when the vehicle is shifted to
reverse or drive within 3 seconds of a cold start.
