ESP family
ESP_a020_WSSGenericTempFault
ABS (anti-lock braking system) disabled
What does the ESP_a020_WSSGenericTempFault alert mean?
Wheel Speed Sensor: General Fault.
What you'll see in your Tesla
- ABS (anti-lock braking system) disabled
- Drive with caution
What triggers it
Three or more sensor signals seem to be affected by temporary failure suspicion at the same time (one or several of the above described failure monitoring are triggered by not plausible or missing WSS signals).
When it clears
Check WSS connections and power cycle.
Potential impact
Will disable VDC/TC and degrade ABS. Leads to deactivation of BSC and EBD.
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.