VCFRONT-A402
VCFRONT_a402_LVBatteryCannotSupportVehicle
Also written as VCFRONT_A402 / VCFRONT A402 / VCFRONT_a402_LVBatteryCannotSupportVehicle / vcfront_a402_lvbatterycannotsupportvehicle
Why does the exact Tesla alert ID matter?
Record the exact alert ID, including underscores, suffixes, and companion alerts. Tesla alerts that look similar can point to different modules, timestamps, and service procedures.
What does VCFRONT-A402 mean?
Tesla alert code in the Vehicle Controller Front (VCFRONT) module. Vehicle is expected to shut down if HV support is lost. info from manualVCFRONT_A402 12V battery is heavily degraded, disconnected, or reverse battery e-fuse is faulted. 12V battery is replaced, battery is re-connected, or reverse battery e-fuse fault clears. 12V battery is unable to support the vehicle and contactors will be permanently closed.
Original Description
Vehicle is expected to shut down if HV support is lost. info from manualVCFRONT_A402 12V battery is heavily degraded, disconnected, or reverse battery e-fuse is faulted. 12V battery is replaced, battery is re-connected, or reverse battery e-fuse fault clears. 12V battery is unable to support the vehicle and contactors will be permanently closed.
Affected Tesla Models
What You May Notice
- Vehicle Controller Front alert: Vehicle is expected to shut down if HV support is lost. info from manualVCFRONT_A402 12V battery is heavily degraded, di
- Some features (climate, lights, or charging) may be temporarily unavailable
- Alert notification in the Tesla app
How to Diagnose and Resolve
- 1 Perform a soft reboot (hold both scroll wheels)
- 2 Check for pending OTA software updates in Controls > Software
- 3 If multiple features remain non-functional, schedule a service appointment
Severity Notes
VCFRONT-A402 is an Alert in the Vehicle Controller Front system. Confirm the vehicle screen and Tesla app show no driving or charging restrictions, and schedule service if the alert returns.