PCS family
PCS_a052_acVoltageNotPresent
External charging equipment not providing power
What does the PCS_a052_acVoltageNotPresent alert mean?
AC voltage not present while being commanded to charge
What you'll see in your Tesla
- External charging equipment not providing power
- Check power source or try different equipment
What triggers it
Charger does not detect AC input voltage to phase while starting up
When it clears
Charger phase state machine clears faults for phase
Potential impact
Inability to start AC charging
Affected models
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
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.