ESP family
ESP_a354_HBCRequestInvalid
Not Available
What does the ESP_a354_HBCRequestInvalid alert mean?
The Hydraulic Boost Compensation (HBC) request from the Decouple Power Brake (DPB) controller is invalid.
What you'll see in your Tesla
- Not Available
What triggers it
HBC request invalid from DPB.
When it clears
No issue is detected in current operation cycle.
Potential impact
Functions in ESP will be available still.
Affected models
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.