EPASTP family
EPASTP_a198_osumC1CsaNearFull
Not Available
What does the EPASTP_a198_osumC1CsaNearFull alert mean?
This alert is reported by the OnlineStackUsageMonitor_R12 (OSUM) component when context switch area (CSA) stack usage on core 1 is almost full.
What you'll see in your Tesla
- Not Available
What triggers it
EPAS memory usage monitor detected high consumption warning (context switch area usage on Core1).
When it clears
EPAS power cycle. EPAS software update with a bigger stack.
Potential impact
No impact
Affected models
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.