DPB family
DPB_a291_extDBRRequestTooLow
Power braking assist reduced
What does the DPB_a291_extDBRRequestTooLow alert mean?
System has detected that the requested external Dynamic Braking Resistor (DBR) falls below the minimum legal required brake torque.
What you'll see in your Tesla
- Power braking assist reduced
- Braking may require increased effort
What triggers it
System has detected that the requested external DBR falls below the minimum legal required brake torque..
When it clears
DBR request is on legal range
Potential impact
Driver may have to press brake pedal with increased efforts to stop.
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.