USM-A240
USM_a240_s1HwComErrDiagnostics
Also written as USM_A240 / USM A240 / USM_a240_s1HwComErrDiagnostics / usm_a240_s1hwcomerrdiagnostics
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-A240 mean?
Tesla alert code in the Ultrasonic Sensor Module (USM) module. Alert indicating at least 1 of the 12 fascia ultrasonic sensors has a communication error set Unexpected fault in a E52417 device The E52417 device is reporting a fault condition The vehicle is not able to go to sleep because of some ECU's not going quiet on one or more CAN buses Exiting SLEEP_STANDBY vehicle state without successfully putting buses to sleep. 12V battery high current draw, will need to support 12V battery sooner than expected
Original Description
Alert indicating at least 1 of the 12 fascia ultrasonic sensors has a communication error set Unexpected fault in a E52417 device The E52417 device is reporting a fault condition The vehicle is not able to go to sleep because of some ECU's not going quiet on one or more CAN buses Exiting SLEEP_STANDBY vehicle state without successfully putting buses to sleep. 12V battery high current draw, will need to support 12V battery sooner than expected
Affected Tesla Models
What You May Notice
- Ultrasonic Sensor Module alert: Alert indicating at least 1 of the 12 fascia ultrasonic sensors has a communication error set Unexpected fault in a E524
- 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-A240 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.