VCSEC-A203
VCSEC_a203_rearEndpointLostComm
Also written as VCSEC_A203 / VCSEC A203 / VCSEC_a203_rearEndpointLostComm / vcsec_a203_rearendpointlostcomm
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-A203 mean?
Tesla alert code in the Vehicle Controller Security (VCSEC) module. The security controller did not receive event for more than 10sec from the rear endpoint The security does not hear any response when requesting an event from an endpoint for more than 10sec Any response from an endpoint is received
Original Description
The security controller did not receive event for more than 10sec from the rear endpoint The security does not hear any response when requesting an event from an endpoint for more than 10sec Any response from an endpoint is received
Affected Tesla Models
What You May Notice
- Vehicle Controller Security alert: The security controller did not receive event for more than 10sec from the rear endpoint The security does not hear any
- 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-A203 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.