TESLA Alert

VCSEC-A205

VCSEC_a205_MTUUpdateNotConfirmed

Also written as VCSEC_A205 / VCSEC A205 / VCSEC_a205_MTUUpdateNotConfirmed / vcsec_a205_mtuupdatenotconfirmed

System
VCSEC
Vehicle Controller Security
Type
Alert
Category
Body
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 VCSEC-A205 mean?

Tesla alert code in the Vehicle Controller Security (VCSEC) module. MTU update from BLE endpoint was not confirmed

Original Description

MTU update from BLE endpoint was not confirmed

Affected Tesla Models

Model SModel XModel 3Model YCybertruck

What You May Notice

  • Vehicle Controller Security alert: MTU update from BLE endpoint was not confirmed
  • Possible issue with keyless entry or passive entry
  • Alert in the Tesla app

How to Diagnose and Resolve

  1. 1 Reboot the vehicle
  2. 2 Re-pair your phone key or key card in Controls > Locks
  3. 3 Schedule service if Sentry Mode or key access remains unreliable

Severity Notes

VCSEC-A205 is an Alert in the Vehicle Controller Security system. Confirm the vehicle screen and Tesla app show no driving or charging restrictions, and schedule service if the alert returns.

Other VCSEC Codes

VCSEC_a001 VCSEC_a002 VCSEC_a003 VCSEC_a005 VCSEC_a006 VCSEC_a010 VCSEC_a012 VCSEC_a013
View all VCSEC codes →