ESP family
ESP_a031_FrLWSSNoPulsesDetected
ABS (anti-lock braking system) disabled
What does the ESP_a031_FrLWSSNoPulsesDetected alert mean?
WSS fault due to missing wheel speed signal.
What you'll see in your Tesla
- ABS (anti-lock braking system) disabled
- Drive with caution
What triggers it
No stop pulses occurred on WSS
When it clears
Check connections and/or replace WSS
Potential impact
Will disable VDC/TC and degrade ABS
Affected models
Cybertruck
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
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.