Erratic and harsh shifting at highway speeds and/or perceived lack of power when accelerating from a stop,...

Bulletin number

TSB 22-2280

Component

Power train: automatic transmission: control module (TCM/PCM/tecm)

Summary

Some 2020-2021 Mustang GT500 vehicles may experience erratic and harsh shifting at highway speeds and/or perceived lack of power when accelerating from a stop, with a powertrain malfunction (wrench) indicator and diagnostic trouble codes (DTCs) P1601 and/or P061A stored in the powertrain control module (PCM) while using SelectShift. This may be due to the software in the PCM. To correct the condition, follow the Service Procedure to reprogram the PCM.

Owners of these vehicles have filed 35 complaints in the transmission category.