1810316

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.