Flash: Powertrain System Improvements/Enhancements
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 of the following DTCs has been set:
U0140 - Lost Communication With Body Control Module (BCM).
P0607 - ECU Internal Performance.
P2096 - Downstream Fuel Trim System 1 Lean.
P2097 - Downstream Fuel Trim System 1 Rich.
P2098 - Downstream Fuel Trim System 2 Lean.
P2099 - Downstream Fuel Trim System 2 Rich.
P0456 - EVAP System Small Leak.
Scan tool improved accuracy on mode 6, cylinder imbalance.
ASD Relay (to improve fuel pump relay initialization at key on).A small number of customers may experience:
A less than desired idle speed after performing a hard braking maneuver.
