VCTRAILER family
VCTRAILER_a207_dutyCycleLimitTestFailed
Trailer brakes may be unavailable
What does the VCTRAILER_a207_dutyCycleLimitTestFailed alert mean?
The trailer controller (VCTRAILER) attempted to drive the brakes to the calculated duty cycle limit, but the measured current draw exceeded the limit
What you'll see in your Tesla
- Trailer brakes may be unavailable
- Exiting and re-entering vehicle may restore functionality
What triggers it
Overcurrent or a gate driver condition is detected during the post-calibration test
When it clears
End of drive cycle
Potential impact
Trailer brakes may be inoperative
Affected models
Cybertruck
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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.