TSB: Ford EV Charging Performance

Some 2021-2023 Ford Mustang Mach-E vehicles may exhibit a condition where the high voltage battery is slow charging or does not charge while using a level 1 or level 2 Electric Vehicle Supply Equipment (EVSE) after an over the air (OTA) update. This may be due to the software in the secondary in the secondary on-board diagnostic control module A (SOBDM).

To rectify the problem, reprogram the PCM with the latest available software. Disconnect the electric vehicle supply equipment (EVSE) charge cord (if required). Connect the diagnostic tool to the vehicle and establish communication (VID the vehicle).