TESLA Alert
VCSEC-A305
VCSEC_a305_ATTFlowControlViolatedC
Also written as VCSEC_A305 / VCSEC A305 / VCSEC_a305_ATTFlowControlViolatedC / vcsec_a305_attflowcontrolviolatedc
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-A305 mean?
Tesla alert code in the Vehicle Controller Security (VCSEC) module. An ATT flow control violation was encountered on one of the connections
Original Description
An ATT flow control violation was encountered on one of the connections
Affected Tesla Models
Model SModel XModel 3Model YCybertruck
What You May Notice
- Vehicle Controller Security alert: An ATT flow control violation was encountered on one of the connections
- Possible issue with keyless entry or passive entry
- Alert in the Tesla app
How to Diagnose and Resolve
- 1 Reboot the vehicle
- 2 Re-pair your phone key or key card in Controls > Locks
- 3 Schedule service if Sentry Mode or key access remains unreliable
Severity Notes
VCSEC-A305 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 →