VCFRONT-A165
VCFRONT_a165_unxpctdEFuseLckout
Also written as VCFRONT_A165 / VCFRONT A165 / VCFRONT_a165_unxpctdEFuseLckout / vcfront_a165_unxpctdefuselckout
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-A165 mean?
Tesla alert code in the Vehicle Controller Front (VCFRONT) module. The port expanders on the front controller are inhibitted because there is voltage on the eFuse lockout circuit. Voltage detected on the lockout circuit when the right controller hasn't reported that the lockout circuit is active. When there is no longer voltage on the lockout circuit. Many vehicle functions will not be operational, OTA's will fail. The front vehicle controller has detected a problem with the power conversion system circuit. The front louver is broken and should be replaced. HVAC cabin cooling (air conditioning) and powertrain performance may be limited. Louver fails the calibration range check after 5 calibration cycles due to over-travel Louver is able to calibrate and reach target. The motor cannot reach the target RPM. HVAC cabin cooling (air conditioning) and powertrain performance may be limited The motor RPM is incapable of reaching the target RPM for some time. The motor RPM reaches its target. The thermal fan will not run. HVAC cabin cooling (air conditioning) and powertrain performance may be limited. A reset will occur to attempt to clear the fault.
Original Description
The port expanders on the front controller are inhibitted because there is voltage on the eFuse lockout circuit. Voltage detected on the lockout circuit when the right controller hasn't reported that the lockout circuit is active. When there is no longer voltage on the lockout circuit. Many vehicle functions will not be operational, OTA's will fail. The front vehicle controller has detected a problem with the power conversion system circuit. The front louver is broken and should be replaced. HVAC cabin cooling (air conditioning) and powertrain performance may be limited. Louver fails the calibration range check after 5 calibration cycles due to over-travel Louver is able to calibrate and reach target. The motor cannot reach the target RPM. HVAC cabin cooling (air conditioning) and powertrain performance may be limited The motor RPM is incapable of reaching the target RPM for some time. The motor RPM reaches its target. The thermal fan will not run. HVAC cabin cooling (air conditioning) and powertrain performance may be limited. A reset will occur to attempt to clear the fault.
Affected Tesla Models
What You May Notice
- Vehicle Controller Front alert: The port expanders on the front controller are inhibitted because there is voltage on the eFuse lockout circuit. Voltage
- 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-A165 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.