PCS family
PCS_a078_chgStopDcdcTooHot
Vehicle systems over temperature limit
What does the PCS_a078_chgStopDcdcTooHot alert mean?
AC charging is stopped because DCDC is too hot
What you'll see in your Tesla
- Vehicle systems over temperature limit
- AC charging unavailable / Try DC charging
What triggers it
DCDC converter temperature exceeds threshold for more than five seconds while AC charging is active
When it clears
DCDC converter temperature is below clear threshold for more than twenty seconds
Potential impact
Inability to AC charge
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.