MyTeslaMate
PCS family

PCS_a085_dcdcFetsNotSwitching

Not Available

What does the PCS_a085_dcdcFetsNotSwitching alert mean?

The Power Conversion System (PCS) electronic control unit (ECU) detects the DCDC tank current period is too long, indicating the DCDC metal-oxide-semiconductor field-effect transistor (MOSFETs) are not switching properly.

What you'll see in your Tesla

  • Not Available

What triggers it

The PCS ECU detects the DCDC MOSFETs are not switching properly.

When it clears

The PCS ECU detects the DCDC MOSFETs are switching properly.

Potential impact

Vehicle is unable to drive, charge, or support the low voltage (LV) battery / electrical system until the DCDC MOSFETs switch properly.

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.