APP family
APP_w358_isaSystemFault
Not Available
What does the APP_w358_isaSystemFault alert mean?
The Autopilot electronic control unit (ECU) detects a condition affecting functionality of Intelligent Speed Assist(ISA) system(s).
What you'll see in your Tesla
- Not Available
What triggers it
The Autopilot ECU detects Intelligent Speed Assist(ISA) system(s) encountered an invalid condition for enabling ISA.
When it clears
The Autopilot ECU detects no condition affecting functionality of Intelligent Speed Assist(ISA) system(s).
Potential impact
Autopilot features may be unavailable, or may not function as expected.
Affected models
Cybertruck
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
Model Y 2025+
Semitruck
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.