VCSEC family
VCSEC_a140_nfcAuthentication
Not Available
What does the VCSEC_a140_nfcAuthentication alert mean?
The security controller did not authenticate the NFC card
What you'll see in your Tesla
- Not Available
What triggers it
NFC card failed to authenticate with security controller
When it clears
NFC card successfully authenticates
Potential impact
NFC card may fail to unlock vehicle or start drive
Affected models
Cybertruck
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
Model Y 2025+
Track your Tesla's alerts automatically
Alerts like this reach MyTeslaMate through your car's Tesla telemetry API. MyTeslaMate logs every alert your Tesla reports and turns it into readable history and real-time notifications — hosted TeslaMate with no server to run.