DPB family
DPB_a039_plungerCircuitPressLow
Power braking assist reduced
What does the DPB_a039_plungerCircuitPressLow alert mean?
Pressure in plunger circuit is too low.
What you'll see in your Tesla
- Power braking assist reduced
- Braking may require increased effort
What triggers it
A too low pressure alert occurs, if the actual pressure is much lower than the target pressure.
When it clears
Good Check is successful, if actual pressure is in range of target pressure and not much lower. A hydraulic pressure build up is required
Potential impact
System will request Hydraulic Boost Compensation when driver pressed the 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.