EPASTP family
EPASTP_a239_espWsCntError
Not Available
What does the EPASTP_a239_espWsCntError alert mean?
Invalid ESP_wheelSpeedsCounter value received
What you'll see in your Tesla
- Not Available
What triggers it
ESP_wheelSpeedsCounter is not incrementing correctly
When it clears
Electronic Power Assist Steering (EPAS) observes ESP_wheelSpeedsCounter incrementing correctly
Potential impact
The power steering is operational but the level of assist is decreased
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.