PCS family
PCS_a100_suspectedViperChipIssue
Not Available
What does the PCS_a100_suspectedViperChipIssue alert mean?
The Power Conversion System (PCS) electronic control unit (ECU) detects the viper chip is experiencing a condition affecting AC charging functionality.
What you'll see in your Tesla
- Not Available
What triggers it
The PCS ECU detects a viper chip condition preventing the charger phase from boosting the intermediate bus to the specified threshold.
When it clears
AC charging is stopped.
Potential impact
No expected impact on vehicle functionality.
Affected models
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.