DPB_a091_MRGPathTestFault
Power braking assist reduced
What does the DPB_a091_MRGPathTestFault alert mean?
The control over MRG via EN_HY or MRAUC or both does not work.
What you'll see in your Tesla
- Power braking assist reduced
- Braking may require increased effort
What triggers it
MRG is either always switched ON or Not able to Switch OFF when Hydraulic Enable or MRA control is pulled LOW.
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
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.