DPB family
DPB_a041_PSCGearRatioReadFault
Power braking assist reduced
What does the DPB_a041_PSCGearRatioReadFault alert mean?
There is gear ration value in the Non-Volatile Memory (NVM).
What you'll see in your Tesla
- Power braking assist reduced
- Braking may require increased effort
What triggers it
NVM gear ration value is missing when read at startup.
When it clears
Write the correct value of gear ratio to the NvM block 'Gear_Ratio' and reset the system.
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+
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