TESLA Alert

UMC-A003

UMC_a003_GFCISelfTestFault

Also written as UMC_A003 / UMC A003 / UMC_a003_GFCISelfTestFault / umc_a003_gfciselftestfault

System
UMC
Universal Mobile Connector
Type
Alert
Category
Charging
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 UMC-A003 mean?

Tesla alert code in the Universal Mobile Connector (UMC) module. UMC GFCI self test failed

Original Description

UMC GFCI self test failed

Affected Tesla Models

Model SModel XModel 3Model Y

What You May Notice

  • UMC-A003 may appear with another Tesla alert in the Universal Mobile Connector (UMC) system.
  • The vehicle may limit charging, driving, comfort, or safety features depending on the active alerts.
  • The alert may clear after sleep, but recurring alerts should be treated as service-relevant.

How to Diagnose and Resolve

  1. 1 Reboot the vehicle
  2. 2 Check for OTA software updates
  3. 3 Monitor over the next few drives; schedule service if alert recurs

Severity Notes

UMC-A003 is an Alert in the Universal Mobile Connector system. Confirm the vehicle screen and Tesla app show no driving or charging restrictions, and schedule service if the alert returns.

Other UMC Codes

UMC_a001 UMC_a002 UMC_a004 UMC_a005 UMC_a006 UMC_a007 UMC_a008 UMC_a009
View all UMC codes →