DPB_a107_vrOnFails
Power braking assist reduced
What does the DPB_a107_vrOnFails alert mean?
A switched on valve relay is reported as off (system chip internal status).
What you'll see in your Tesla
- Power braking assist reduced
- Braking may require increased effort
What triggers it
Erroneous safety logic (Valve relay gate does not switch on or feedback of system chip is wrong), The failsafe logic test switches on the valve relay and checks whether the gate actuation (system chip internally) is possible, If not, this fault is set.
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.