UI-A122
UI_a122_AMDI2C0LostArbitration
Also written as UI_A122 / UI A122 / UI_a122_AMDI2C0LostArbitration / ui_a122_amdi2c0lostarbitration
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-A122 mean?
Tesla alert code in the User Interface (UI) module. AMD i2c Bus 0 lost arbitration during a transaction Display status check failed due to datastream deserialization error. The deserialiser check failed because I2C bus 2 failed to open or reading the deserialization chip id failed. The I2C bus 2 has to initialize and the deserialization chip id has to be read successfully. Touchscreen is blank, unresponsive or has limited functionality.
Original Description
AMD i2c Bus 0 lost arbitration during a transaction Display status check failed due to datastream deserialization error. The deserialiser check failed because I2C bus 2 failed to open or reading the deserialization chip id failed. The I2C bus 2 has to initialize and the deserialization chip id has to be read successfully. Touchscreen is blank, unresponsive or has limited functionality.
Affected Tesla Models
What You May Notice
- User Interface alert: AMD i2c Bus 0 lost arbitration during a transaction Display status check failed due to datastream deserialization error.
- 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
UI-A122 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.