MyTeslaMate
DPB family

DPB_a229_IREFOutOfRange

Power braking assist reduced

What does the DPB_a229_IREFOutOfRange alert mean?

The ASIC internal current reference is out of range.

What you'll see in your Tesla

  • Power braking assist reduced
  • Braking may require increased effort

What triggers it

Problem of ASIC reset logic. The ASIC provides an internal current reference that is used for monitorings/internal checks.

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.