PCS family
PCS_a054_chgInputVDropTooHigh
Charging stopped due to large voltage drop
What does the PCS_a054_chgInputVDropTooHigh alert mean?
Charging faulted due to too large of a voltage drop between starting charge and during charge
What you'll see in your Tesla
- Charging stopped due to large voltage drop
- Remove extension cords / Have wiring inspected
What triggers it
Charger detects greater than 14% input voltage drop after ramping power
When it clears
Charge cable is removed or inserted or battery management system issues clear fault request
Potential impact
Inability to AC charge, possibly due to bad wiring external to vehicle
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.