EPASTS_a047_epmVregVoltFail

This alert is reported by the ExternalPowerManager_A8140x (EPM) component when it detects VREG over and under voltage.

 Live incidence rate

<0.01% (Extremely rare)

Vehicle messages

None displayed

Impact

EPAS full loss of assist.

Description

This alert is reported by the ExternalPowerManager_A8140x (EPM) component when it detects VREG over and under voltage.

Cause

EPAS ECU EPM device voltage monitoring failed (VREG over/under-voltage).

Clear condition

EPAS HW failure. EPAS power cycle N times and if persists, the gear needs to be changed.

Models

Model Y, Model Y 2025+

Visibility

service-fix

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