IDB_a027_circuitPresSensorFault
Power braking assist reduced
What does the IDB_a027_circuitPresSensorFault alert mean?
The Integrated Dynamic Brake (IDB) circuit pressure sensor signal has an issue or the sensor is shorted to power/ground.
What you'll see in your Tesla
- Power braking assist reduced
- Braking may require increased effort
What triggers it
The IDB detects an issue with the brake circuit pressure sensor.
When it clears
The issue is no longer detected by the IDB. If the condition persists, the IDB module may require replacement.
Potential impact
Brake boost pressure is limited to 100 bar. Anti-lock Brake System (ABS), Brake Traction Control (BTC), Vehicle Dynamics Control (VDC), Panic Brake Assist (PBA), Hydraulic Fade Compensation (HFC), Controlled Deceleration via Parking brake (CDP), Brake Disc Wipe (BDW), External Brake Request (EBR), and Secondary Collision Mitigation (SCM) may be unavailable. The vehicle should be driven with extreme caution.
Affected models
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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.