Flash: Powertrain Diagnostic and System Improvements
This bulletin involves selectively erasing and reprogramming the Powertrain Control
Module (PCM) with new software.
A small number of customers may experience a Malfunction Indicator Lamp (MIL)
illumination. Upon further investigation the Technician may find one or more of the
following Diagnostic Trouble Codes (DTCs) set in the PCM:
? U0140 - Lost Communication With Body Control Module (BCM) (RT Vehicles
Only).
? P0456 - Evap System Small Leak.
Transmission Enhancements are also included with this software release. These
changes include the following:
? Garage shift engagements into D may be harsh at times after shutdowns of 10-30
minute duration.
? 5/6 Upshift timing adjusted to improve top speed performance (markets where
speeds in excess of 161 kph (100 mph) are permitted).
NOTE: The Transmission Enhancements only apply to vehicles equipped with the
3.6L engine (sales code ERB).
