TESLA Alert

UI-A123

UI_a123_AMDI2C1LostArbitration

Also written as UI_A123 / UI A123 / UI_a123_AMDI2C1LostArbitration / ui_a123_amdi2c1lostarbitration

System
UI
User Interface
Type
Alert
Category
Network
Severity
Alert

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 UI-A123 mean?

Tesla alert code in the User Interface (UI) module. AMD i2c Bus 1 lost arbitration during a transaction

Original Description

AMD i2c Bus 1 lost arbitration during a transaction

Affected Tesla Models

Model SModel XModel 3Model YCybertruck

What You May Notice

  • User Interface alert: AMD i2c Bus 1 lost arbitration during a transaction
  • 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

UI-A123 is an Alert in the User Interface system. Confirm the vehicle screen and Tesla app show no driving or charging restrictions, and schedule service if the alert returns.

Other UI Codes

UI_a001 UI_a002 UI_a003 UI_a004 UI_a005 UI_a006 Tesla alert code in the User Interface (UI) module. Alert se... UI_a007 Tesla alert code in the User Interface (UI) module. High Vol... UI_a008
View all UI codes →