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

Bulletin number

21-003-25

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): ● P0810-00 - Clutch Position Control Error. ● P16F0-00 - SPI Comm Hardware Fault. Customers may also comment on one or more of the following: ● K0 Adaptation routine runs when vehicle stationary and EV Mode. ● Vehicle loses propulsion capability. ● Service transmission warning indicator is on. NOTE: Require key cycle to recover. ● Shifts rough occasionally when coming down to a stop. ● Shifts rough occasionally when accelerating. ● Shifts rough when transitioning from EV to Hybrid operation on low SoC. ● Shifts rough when engines starts. ● On part throttle accelerations with little to no battery available the transition from battery power to engine on is harsh and abrupt. ● The engine oil life on dashboard drops down too fast when the engine oil dilution reaches high level without the ability to recover. This bulletin involves reprogramming the TCM with the latest available software."

Owners of these vehicles have filed 44 complaints in the transmission category.