EPASTP family
EPASTP_a199_osumC1StackNearFull
Not Available
What does the EPASTP_a199_osumC1StackNearFull alert mean?
This alert is reported by the OnlineStackUsageMonitor_R12 (OSUM) component when stack usage on core 1 is almost full.
What you'll see in your Tesla
- Not Available
What triggers it
If stack usage on core 1 is almost full. EPAS memory usage monitor detected high consumption warning (stack 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+
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.