Flash: Transmission Shift And Drivability Enhancements
This bulletin involves reprogramming the Transmission Control Module (TCM) with the
latest available 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):
? P0711 - Transmission Fluid Temperature Sensor A Circuit Range-Performance
? P1CC9 - Unable to Engage Gear
? P1D98 - Incorrect Gear Ratio Clutch B or D Defective
? P1DAD - Input Shaft-Output Shaft Direction Correlation
? U1424 - Implausible Engine Torque Signal Received
In addition, the customer may also experience one or more of the following transmission
related conditions:
? Less than desired 1-2 upshift on tip-in acceleration.
? Less than desired accelerator pedal response in Sport and TractionPlus modes.
? RPM flare at engine start.
? Less than desired idle performance when shifting into DRIVE or REVERSE following
a cold start.
