DPB family
DPB_a032_HWParamWriteFailed
Power braking assist reduced
What does the DPB_a032_HWParamWriteFailed alert mean?
The Decoupled Power Brake (DPB) parameters in Non-Volatile Memory (NVM) cannot be written.
What you'll see in your Tesla
- Power braking assist reduced
- Braking may require increased effort
What triggers it
Linear Position Sensor IDs NvM write request failed. Alert during write process of NvM Items at ECU Exchange routine.
When it clears
Set ECU item 'NvMLipsID' to 4x 0xEE EE and 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+
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.