DPB family
DPB_a029_motorTestFault
Power braking assist reduced
What does the DPB_a029_motorTestFault alert mean?
A condition affecting the brake motor control is detected when tested.
What you'll see in your Tesla
- Power braking assist reduced
- Braking may require increased effort
What triggers it
During a motor test activated at start up or when the brake is not applied, an electrical, phase current sensing, or motor issue is detected.
When it clears
new power cycle will trigger motor test again
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.