EPASTP family
EPASTP_a048_epmVcpVoltFail
Not Available
What does the EPASTP_a048_epmVcpVoltFail alert mean?
This alert is reported by the ExternalPowerManager_A8140x (EPM) component in case of under voltage on the first charge pump.
What you'll see in your Tesla
- Not Available
What triggers it
EPAS ECU EPM device voltage monitoring failed (undervoltage detected on first charge pump).
When it clears
EPAS HW failure. EPAS power cycle N times and if persists, the gear needs to be changed.
Potential impact
EPAS full loss of assist.
Affected models
Model Y
Model Y 2025+
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