PCS2 family
PCS2_a002_canRationality
Not Available
What does the PCS2_a002_canRationality alert mean?
The Power Conversion System (PCS) controller area network (CAN) receiver encounters an error while receiving messages.
What you'll see in your Tesla
- Not Available
What triggers it
The PCS CAN receiver encounters an error while receiving messages.
When it clears
The PCS CAN receiver does not detect any errors for more than five seconds.
Potential impact
DCDC and AC Charging may be limited or unavailable.
Affected models
Model 3 2017-2023
Model 3 2024+
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.