RCM2 family
RCM2_a143_hvdPyroShort
Safety restraint system issue
What does the RCM2_a143_hvdPyroShort alert mean?
HV Disconnect Pyro - Resistance too Low
What you'll see in your Tesla
- Safety restraint system issue
- Service is required
What triggers it
There is a low resistance with the high voltage disconnect pyro.
When it clears
The low resistance is rectified.
Potential impact
The High Voltage Pyro Disconnect may not perform as designed.
Affected models
Cybertruck
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
Model Y 2025+
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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.