TESLA Warning

MCU-W055

MCU_w055_CellRoamingDisallowed

Also written as MCU_W055 / MCU W055 / MCU_w055_CellRoamingDisallowed / mcu_w055_cellroamingdisallowed

System
MCU
Media Control Unit
Type
Warning
Category
Network
Severity
Warning

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. 1 Perform a soft reboot (hold both scroll wheels for ~10 seconds)
  2. 2 Check for pending OTA software updates
  3. 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

View all MCU codes →