PCS family
PCS_a040_dcdcMaxPowerReached
Not Available
What does the PCS_a040_dcdcMaxPowerReached alert mean?
The Power Conversion System (PCS) electronic control unit (ECU) detects the DCDC converter reaches the maximum output power based on the hardware capability.
What you'll see in your Tesla
- Not Available
What triggers it
The PCS ECU detects the DCDC converter reaches the maximum output power for more than 3 seconds.
When it clears
The PCS ECU detects the DCDC converter is below the maximum output power for more than 30 seconds.
Potential impact
The low voltage (LV) battery may not charge properly, and the LV bus may begin loadshedding.
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.