DPB family
DPB_a031_HWParamReadFailed
Power braking assist reduced
What does the DPB_a031_HWParamReadFailed alert mean?
The Decoupled Power Brake (DPB) parameters in Non-Volatile Memory (NVM) cannot be read.
What you'll see in your Tesla
- Power braking assist reduced
- Braking may require increased effort
What triggers it
NVM parameter item is empty or invalid when NVM values are read and evalulated at start up.
When it clears
Restart System.
Potential impact
System will be running in fully degraded state. Braking may require increased effort. Hydraulic Boost Compensation will be triggered when driver pressed brake pedal.
Affected models
Model Y 2025+
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