TESLA Alert
VCFRONT-A404
VCFRONT_a404_resistanceEstimationHardFailure
Also written as VCFRONT_A404 / VCFRONT A404 / VCFRONT_a404_resistanceEstimationHardFailure / vcfront_a404_resistanceestimationhardfailure
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-A404 mean?
Tesla alert code in the Vehicle Controller Front (VCFRONT) module. The 12V battery internal resistance is too high.
Original Description
The 12V battery internal resistance is too high.
Affected Tesla Models
Model SModel XModel 3Model YCybertruck
What You May Notice
- Vehicle Controller Front alert: The 12V battery internal resistance is too high.
- 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-A404 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.
Other VCFRONT Codes
VCFRONT_a001 VCFRONT_a002 Tesla alert code in the Vehicle Controller Front (VCFRONT) m... VCFRONT_a003 VCFRONT_a005 VCFRONT_a006 VCFRONT_a010 Tesla alert code in the Vehicle Controller Front (VCFRONT) m... VCFRONT_a012 VCFRONT_a013 Tesla alert code in the Vehicle Controller Front (VCFRONT) m...
View all VCFRONT codes →