PCS family
PCS_a042_dcdcEnableLineMismatch
Not Available
What does the PCS_a042_dcdcEnableLineMismatch alert mean?
PCS DCDC hardware enable line does not match CAN signal
What you'll see in your Tesla
- Not Available
What triggers it
DCDC converter detects that sensed enable hardline state does not match state reported on CAN for more than five seconds
When it clears
DCDC converter detects that sensed enable hardline state matches state reported on CAN for more than one second
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+
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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.