USM-A251
USM_a251_s12HwComErrDiagnostics
Also written as USM_A251 / USM A251 / USM_a251_s12HwComErrDiagnostics / usm_a251_s12hwcomerrdiagnostics
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 USM-A251 mean?
Tesla alert code in the Ultrasonic Sensor Module (USM) module. Alert containing diagnostic information for hardware and communication errors reported by the sensor
Original Description
Alert containing diagnostic information for hardware and communication errors reported by the sensor
Affected Tesla Models
What You May Notice
- Ultrasonic Sensor Module alert: Alert containing diagnostic information for hardware and communication errors reported by the sensor
- Autopark feature disabled
- Sensor obstruction or degraded icon on the touchscreen
How to Diagnose and Resolve
- 1 Check ultrasonic sensors (small circular sensors in bumpers) for dirt or ice
- 2 Clean sensors with a soft cloth and retry
- 3 Reboot the vehicle
- 4 Schedule service if sensors remain unavailable after cleaning
Severity Notes
USM-A251 is an Alert in the Ultrasonic Sensor Module system. Confirm the vehicle screen and Tesla app show no driving or charging restrictions, and schedule service if the alert returns.