18-080-16

Flash: Powertrain Diagnostic And System Enhancements This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software. 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) (2012 MY only). · P0116 - Engine Coolant Temperature Sensor Performance (2012 MY only).** · P2173 - High Airflow/Vacuum Leak Detected (Slow Accumulation). The following transmission enhancements are also included in this software update: · 3-2 downshift clunk or bump (2012 Sales Code DG2 only). · 4-3 downshift clunk or bump (2012 Sales Code DG2 only). · 1-2 upshift clunk or bump (2012 Sales Code DG2 only). · 4-5 upshift clunk or bump (2012 Sales Code DG2 only). · 5-6 upshift clunk or bump (2012 Sales Code DG2 only). · RPM Fluctuating or jerking feeling between 96 KPH (60 MPH) to 112 KPH (70 MPH) while operating in cruise control.