EPASTP family
EPASTP_a221_apsCntError
Not Available
What does the EPASTP_a221_apsCntError alert mean?
Invalid APS_eacMonitorCounter value received
What you'll see in your Tesla
- Not Available
What triggers it
APS_eacMonitorCounter not incrementing correctly
When it clears
Electronic Power Assist Steering (EPAS) observes APS_eacMonitorCounter incrementing correctly
Potential impact
External Angle Controller inhibited
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.