UMC family
UMC_a020_applicationCRC
Not Available
What does the UMC_a020_applicationCRC alert mean?
UMC application memory did not match expected CRC
What you'll see in your Tesla
- Not Available
What triggers it
UMC application memory fails integrity check
When it clears
UMC application memory passes integrity check
Potential impact
UMC will not operate until application memory passes an integrity check
Affected models
Cybertruck
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
Model Y 2025+
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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.