APS family
APS_w021_ECU_Temperature_Issue
Not Available
What does the APS_w021_ECU_Temperature_Issue alert mean?
Autopilot Processor Secondary (APS) detects Electronic Control Unit (ECU) temperature out of nominal range.
What you'll see in your Tesla
- Not Available
What triggers it
APS monitors the temperature sensor then alerts when temperature exceeds nominal range.
When it clears
Clears when temperature returns to nominal range.
Potential impact
System may shut down to prevent part damage. Autopilot features will be unavailable.
Affected models
Cybertruck
Model 3 2017-2023
Model 3 2024+
Model S 2012-2020
Model S 2021+
Model X 2015-2020
Model X 2021+
Model Y
Model Y 2025+
Semitruck
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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.