CC family
CC_a008_inputUnderVoltage
Unable to charge - Input voltage too low
What does the CC_a008_inputUnderVoltage alert mean?
Alternating current (AC) root mean square (RMS) input voltage is too low.
What you'll see in your Tesla
- Unable to charge - Input voltage too low
- Voltage must be within Wall Connector rating
What triggers it
AC RMS input voltage fell below 160 V RMS for more than 2 seconds.
When it clears
AC RMS input voltage rises above 170 V RMS for more than 2 seconds.
Potential impact
Wall connector will not allow charging while the input voltage is too low.
Affected models
Cybertruck
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.