DPB family
DPB_a090_flashFault
Power braking assist reduced
What does the DPB_a090_flashFault alert mean?
The Decoupled Power Brake (DPB) reports an issue during flashing.
What you'll see in your Tesla
- Power braking assist reduced
- Braking may require increased effort
What triggers it
A flash error like an incorrect checksum or single error overflow is detected.
When it clears
No internal issue is detected after changing operation cycle. If the condition persists, the DPB module may require replacement.
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.