VCFRONT-A164
VCFRONT_a164_eFuseLckoutMissing
Also written as VCFRONT_A164 / VCFRONT A164 / VCFRONT_a164_eFuseLckoutMissing / vcfront_a164_efuselckoutmissing
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-A164 mean?
Tesla alert code in the Vehicle Controller Front (VCFRONT) module. The voltage on the lockout circuit is not at 5V when the right controller is commanding it on. The voltage read on the lockout circuit when the right controller is reporting that the lockout circuit is active is not high enough. When the lockout is de-asserted or voltage reaches >2.5V There is a risk of eFuses toggling if the front controller is reset and NVRAM doesn't work as expected.
Original Description
The voltage on the lockout circuit is not at 5V when the right controller is commanding it on. The voltage read on the lockout circuit when the right controller is reporting that the lockout circuit is active is not high enough. When the lockout is de-asserted or voltage reaches >2.5V There is a risk of eFuses toggling if the front controller is reset and NVRAM doesn't work as expected.
Affected Tesla Models
What You May Notice
- Vehicle Controller Front alert: The voltage on the lockout circuit is not at 5V when the right controller is commanding it on. The voltage read on the l
- 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-A164 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.