MyTeslaMate
IDB family

IDB_a014_FrLWSSFault

ABS (anti-lock braking system) disabled

What does the IDB_a014_FrLWSSFault alert mean?

A front-left wheel speed signal issue has occured.

What you'll see in your Tesla

  • ABS (anti-lock braking system) disabled
  • Drive with caution

What triggers it

A front-left wheel speed sensor (Integrated Dynamic Brake [IDB] connector pins 42, 43) issue is detected.

When it clears

The wheel speed sensor signal is in normal range and the temperature of the IDB's internal sensing circuit is less than 190 degrees Celsius. If the issue persists, a wheel speed sensor or wiring issue requiring repair or replacement is possible.

Potential impact

Only brake boost may be 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. The vehicle should be driven with extreme caution.

Affected models

Model Y 2025+

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.