VCFRONT-A179
VCFRONT_a179_highLVAmpsIntoPCS
Also written as VCFRONT_A179 / VCFRONT A179 / VCFRONT_a179_highLVAmpsIntoPCS / vcfront_a179_highlvampsintopcs
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-A179 mean?
Tesla alert code in the Vehicle Controller Front (VCFRONT) module. High low voltage current into the PCS was detected when not precharging the high voltage bus. Current higher than 5 amps detected for more than 1 second. Vehicle re-attempts to close contactors and current is not higher than 5 amps detected for more than 1 second. PCS will not be supplied with low voltage power. The front controller was not able to go to sleep because a UI keep awake reason was triggered. The power conversion system eFuse current average current value over the last second was > 150A. 150A average eFuse current within last second.
Original Description
High low voltage current into the PCS was detected when not precharging the high voltage bus. Current higher than 5 amps detected for more than 1 second. Vehicle re-attempts to close contactors and current is not higher than 5 amps detected for more than 1 second. PCS will not be supplied with low voltage power. The front controller was not able to go to sleep because a UI keep awake reason was triggered. The power conversion system eFuse current average current value over the last second was > 150A. 150A average eFuse current within last second.
Affected Tesla Models
What You May Notice
- Vehicle Controller Front alert: High low voltage current into the PCS was detected when not precharging the high voltage bus. Current higher than 5 amps
- 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-A179 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.