TSB 22-2138

Some 2021 Mustang Mach-E GT vehicles may exhibit a Suspension Fault Speed Limited To 80 MPH (or 120 km/h) message or Driver Selectable Suspension Fault Service Required message in the IPC with diagnostic trouble code (DTC) C1121:64. This may be due to the vehicle dynamics module (VDM) software. To correct the condition, follow the service procedure to reprogram the VDM.