VCFRONT_a257 — Port Expander VOR

Full alert identifier: VCFRONT_a257_portExpanderVOR

Alert description

The front vehicle controller (VCFRONT) has detected a condition affecting a group of eFuses, making an eFuse system reset necessary.

Vehicle may be unable to drive.

VCFRONT detects a group of eFuses with a common power source have all tripped (circuit opened).

The integrated circuit (I2C) port expander connecting the microcontroller and eFuse enable pins is reset after a retry or sleep cycle.

Open this alert in Service Mode Plus and review the Payload tab. Use the field names below to identify the values shown by your vehicle.

Signal	Unit
Lockout Voltage `VCFRONT_a257_lockoutVoltage`	V

Signal	Unit
Epas 3 P Fault `VCFRONT_a257_epas3pFault`	—
Epas 3 S Fault `VCFRONT_a257_epas3sFault`	—
Esp Fault `VCFRONT_a257_espFault`	—
I Booster Fault `VCFRONT_a257_iBoosterFault`	—
Pcs Fault `VCFRONT_a257_pcsFault`	—
Rev Batt Fault `VCFRONT_a257_revBattFault`	—
Vbat Fused Fault `VCFRONT_a257_vbatFusedFault`	—
Vcleft Fault `VCFRONT_a257_vcleftFault`	—

Show 3 more fields

Signal	Unit
Vcright Fault `VCFRONT_a257_vcrightFault`	—
Vcright Lockout Status `VCFRONT_a257_vcrightLockoutStatus` 0 IDLE 1 PENDING 2 ACTIVE	—
Vehicle State `VCFRONT_a257_vehicleState`	—

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of VCFRONT_a257.