Flash: Transmission Diagnostic And Shift Enhancements

Bulletin number

21-016-16

Component

Power train

Summary

Flash: Transmission Diagnostic And Shift Enhancements This bulletin involves reprogramming the Transmission Control Module (TCM) with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find that the following Diagnostic Trouble Codes (DTCs) have been set: · P0887-00 - TCM Power Control Circuit High (Sales Codes ED6 and EHB). · P061B-00 - Internal Control Module Torque Calculation Performance (Sales Codes ED6 and EHB). · P0711-00 - Transmission Fluid Temperature Sensor A Circuit Range-Performance. · P072F-00 - Stuck In Gear 4. · P076F-00 - Gear 7 shift Incorrect Ratio. · P0810-00 - Clutch Position Control Error. · P1CC9-00 - Unable To Engage Gear. · P0734-00 - Gear 4 Shift Incorrect Ratio. In addition, the following transmission shift and performance improvements are included in this software release: · 2-1 downshift quality when using Electronic Range Shifter (ERS) mode. · Garage shifts (Park to Reverse or Drive) (Sales Code EHB). · Poor 3-1 downshift quality when coasting to a stop (Sales Code ED6). · 3-2 downshift delay while driving on inclines. · Overall coastdown shift quality. · Throttle response and performance feel. · Management and prevention of busy shifting. · Lift foot/change mind shift quality.

Owners of these vehicles have filed 1,472 complaints in the transmission category.