CP family
CP_a059_swcanError
Not Available
What does the CP_a059_swcanError alert mean?
The charge port (CP) electronic control unit (ECU) is unable to establish single wire controller area network (SWCAN) communications.
What you'll see in your Tesla
- Not Available
What triggers it
The CP ECU cannot establish SWCAN communications after multiple attempts.
When it clears
The CP ECU establishes SWCAN communication, or the proximity state changes.
Potential impact
Charging does not start or is interrupted.
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.