EPASTP_a027_mcusscDmuHfErr

This alert is reported by MCUSafetyStartupChecks_TC3x (MCUSSC) component when there is a Flash Operation Error OR Command Sequence Error OR Protection Error OR Program Verify Error OR Erase Verify Error OR SRI Bus Address ECC Error OR UCB Original Error.

Live incidence rate

<0.01% (Extremely rare)

Vehicle messages

None displayed

Impact

EPAS full loss of assist.

Description

This alert is reported by MCUSafetyStartupChecks_TC3x (MCUSSC) component when there is a Flash Operation Error OR Command Sequence Error OR Protection Error OR Program Verify Error OR Erase Verify Error OR SRI Bus Address ECC Error OR UCB Original Error.

Cause

EPAS uC peripheral (DMU_HF) startup checks failure at startup.

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

Want to track your firmware alerts, trips and more?

Sign up for Tessie. Try it free for 14 days. Happiness guaranteed.