TESLA Warning
MCU-W055
MCU_w055_CellRoamingDisallowed
Also written as MCU_W055 / MCU W055 / MCU_w055_CellRoamingDisallowed / mcu_w055_cellroamingdisallowed
Why does the exact Tesla alert ID matter?
Record the exact alert ID, including underscores, suffixes, and companion alerts. Tesla alerts that look similar can point to different modules, timestamps, and service procedures.
What does MCU-W055 mean?
Tesla warning code in the Media Control Unit (MCU) module. The vehicle no longer has cell data access.
Original Description
The vehicle no longer has cell data access.
Affected Tesla Models
Model SModel XModel 3Model Y
What You May Notice
- Media Control Unit alert: The vehicle no longer has cell data access.
- Touchscreen may show an error for one or more apps or settings
- Feature may restore itself after a reboot
How to Diagnose and Resolve
- 1 Perform a soft reboot (hold both scroll wheels for ~10 seconds)
- 2 Check for pending OTA software updates
- 3 If the issue persists, schedule a service appointment
Severity Notes
MCU-W055 is a Warning in the Media Control Unit system. Schedule service soon. Monitor your vehicle for additional warnings.
Other MCU Codes
MCU_u001 Tesla unknown code in the Media Control Unit (MCU) module. T... MCU_u002 Tesla unknown code in the Media Control Unit (MCU) module. T... MCU_u003 Tesla unknown code in the Media Control Unit (MCU) module. T... MCU_u004 MCU_u005 Tesla unknown code in the Media Control Unit (MCU) module. T... MCU_u006 Tesla unknown code in the Media Control Unit (MCU) module. T... MCU_u007 Tesla unknown code in the Media Control Unit (MCU) module. T... MCU_u008 Tesla unknown code in the Media Control Unit (MCU) module. T...
View all MCU codes →