PCS family
PCS_a049_dcdcTempRationality
Not Available
What does the PCS_a049_dcdcTempRationality alert mean?
PCS DCDC temperature sensor is reporting irrational value
What you'll see in your Tesla
- Not Available
What triggers it
DCDC converter temperature is outside expected range for more than one second
When it clears
DCDC converter temperature is within expected range
Potential impact
Reduced available DCDC output power
Affected models
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
Model Y 2025+
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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.