IDB_a005_supplyMidUndervoltage
ABS (anti-lock braking system) disabled
What does the IDB_a005_supplyMidUndervoltage alert mean?
The Integrated Dynamic Brake (IDB) reports a low power supply voltage.
What you'll see in your Tesla
- ABS (anti-lock braking system) disabled
- Drive with caution
What triggers it
Power supply voltage is less than 8V for 500 milliseconds.
When it clears
Power supply voltage is greater than 8.3V for 500 milliseconds.
Potential impact
Only brake boost is available. Electronic Brake Distribution (EBD), Anti-lock Brake System (ABS), Brake Traction Control (BTC), Vehicle Stability 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. Brake pressure is limited to 100 bar and pressure build rate is limited. 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.