SDCR family
SDCR_a001_powerOnSelfTestFailed
Powertrain requires service
What does the SDCR_a001_powerOnSelfTestFailed alert mean?
Secondary disconnect controller (SDC) failed the drive unit pyro self-test.
What you'll see in your Tesla
- Powertrain requires service
- Vehicle speed and power may be limited
What triggers it
Pyro test voltages were out of range during pyro self-test.
When it clears
Drive / Non-drive transition with successful pyro self-test.
Potential impact
Pyro disconnect may not function as expected.
Affected models
Cybertruck
Model 3 2017-2023
Model 3 2024+
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.