DPB family
DPB_a121_LiPSOutOfRangeLow
Power braking assist reduced
What does the DPB_a121_LiPSOutOfRangeLow alert mean?
Linear Position Sensor, Out of Range Low.
What you'll see in your Tesla
- Power braking assist reduced
- Braking may require increased effort
What triggers it
Linear Position Sensor, OBD Out of Range Low.
When it clears
Switch on ECU wait 5 seconds
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.