PCS family
PCS_a074_hvBusDischargeFailure
Not Available
What does the PCS_a074_hvBusDischargeFailure alert mean?
PCS DCDC failed to discharge HV bus
What you'll see in your Tesla
- Not Available
What triggers it
DCDC converter was unable to discharge HV bus when commanded to
When it clears
DCDC converter state machine clears faults
Potential impact
Inability to perform vehicle precharge, CHAdeMO and GB DC compatibility may be impacted
Affected models
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.