Flash: Transmission Control Module (TCM) Updates Customers must experience a Malfunction Indicator Lamp...

Bulletin number

21-004-25

Component

Power train

Summary

"Flash: Transmission Control Module (TCM) Updates Customers must experience a Malfunction Indicator Lamp (MIL) illumination and the vehicle must exhibit/set one or more of the following Diagnostic Trouble Codes (DTCs): ● P06E4 - Control Module Wake-up Circuit Performance. ● B12B4 - Charge Status Indicator Module Internal. ● P061B - Internal Control Module Torque Calculation Performance. ● P0810 - Clutch Position Control Error. ● P2885 - Engine Disconnect Clutch Engagement Fault. Customers may experience one or more of the following: ● Vehicle loses propulsion capability. ● 'Shift To Park' notification on. ● 'Service Transmission' warning light on. ● Requires key cycle to recover. ● Shifts rough occasionally. ● Harsh shifts when tipping in during a coast down. ● Shifts roughly during coast down. This bulletin involves reprogramming the Transmission Control Module (TCM), Powertrain Control (PCM) and the Auxiliary Hybrid Control Processor (AHCP) also known as Power Inverter Module (PIM) or reprogramming the TCM and PCM only with the latest available software"

Owners of these vehicles have filed 21 complaints in the transmission category.