Flash: Various Driveability Improvements
This bulletin involves selectively erasing and reprogramming the Powertrain Control
Module (PCM) with new software.
Some customers may experience the Electronic Vehicle Information Center (EVIC) Fuel
Economy display is inaccurate or a Malfunction Indicator Lamp (MIL) illumination. Upon
further investigation a technician may find one of more of the following Diagnostic Trouble
Codes (DTCs) set in the PCM memory:
? U0140 - Lost Communication With Body Control Module.
? P1D73 - AGS Performance.
? P0116 - Engine Coolant Temperature Sensor 1 Performance.
? P0456 - Evap System Small Leak.
In addition to addressing the above DTCs, the following powertrain system
improvements/enhancements are also included in this software release.
? Improved Enhanced Automatic Oil Change Indicator (EAOCI) system accuracy.
? Corrected a generic scan tool display issue regarding Mode 6 data accuracy.
