VCFRONT-A220
VCFRONT_a220_reverseBatteryFault
Also written as VCFRONT_A220 / VCFRONT A220 / VCFRONT_a220_reverseBatteryFault / vcfront_a220_reversebatteryfault
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-A220 mean?
Tesla alert code in the Vehicle Controller Front (VCFRONT) module. The reverse battery protection transistor is in its faulted state. This occurs when an abnormally high amount of current is detected flowing from the low voltage (LV) battery vehicle controller (VCFRONT or VCBATT) to the LV battery. The low voltage (LV) battery vehicle controller (VCFRONT or VCBATT) has detected an issue with the reverse battery protection transistor. The low voltage (LV) battery vehicle controller (VCFRONT or VCBATT) no longer detects an issue with the reverse battery protection transistor. The low voltage (LV) electrical system for the vehicle could become unsupported and shut down if power conversion system (PCS) support is also lost
Original Description
The reverse battery protection transistor is in its faulted state. This occurs when an abnormally high amount of current is detected flowing from the low voltage (LV) battery vehicle controller (VCFRONT or VCBATT) to the LV battery. The low voltage (LV) battery vehicle controller (VCFRONT or VCBATT) has detected an issue with the reverse battery protection transistor. The low voltage (LV) battery vehicle controller (VCFRONT or VCBATT) no longer detects an issue with the reverse battery protection transistor. The low voltage (LV) electrical system for the vehicle could become unsupported and shut down if power conversion system (PCS) support is also lost
Affected Tesla Models
What You May Notice
- Vehicle Controller Front alert: The reverse battery protection transistor is in its faulted state. This occurs when an abnormally high amount of current
- 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-A220 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.