PCS family
PCS_a067_dcdcLvRationality
Not Available
What does the PCS_a067_dcdcLvRationality alert mean?
PCS DCDC LV bus voltage reading differs from VCFRONT LV bus voltage reading by an excessive amount
What you'll see in your Tesla
- Not Available
What triggers it
DCDC converter low voltage bus voltage sensor mismatches front vehicle controller's sensed value on CAN for more than three seconds
When it clears
DCDC converter low voltage bus voltage sensor matches front vehicle controller's sensed value on CAN for more than 500ms
Potential impact
Inability to precharge HV bus, inability to support 12V system, inability to drive
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.