Code VCFRONT_a517 was reported by the “Front vehicle controller” controller in the car. The letter “a” in the middle places it among entries of the alert type.
Vehicle Controller Front — the front body controller. It handles the 12 V supply, the frunk, lights, wipers, pumps and cooling valves. One of the most frequently reported groups, because 12 V battery problems land here too.
The most common type. The car logged the event and may have shown it on the screen. The range is wide — from something trivial that clears itself to something that needs attention.
This is how the fault is named inside the car's firmware. For codes without a description it is the most precise clue there is — the name itself says what the event is about.
The text below comes from Tesla's technical documentation. We leave it in the original English so that translation cannot shift its meaning.
Vehicle needs to be charged to recover
Vehicle is in transport mode, SOC is low, and user is interacting with vehicle
Charge vehicle above 20% SOC or exit transport mode
Vehicle will only wake from trunk button and frunk access post
The intelligent battery sensor is reporting a temprature value over 80 degC
IBS may be MIA. Temperature compensated voltage target is lower than intended.
The left vehicle controller eFuse current average current value over the last second was > 90A.
90A average eFuse current within last second.
Copy it exactly, letter and number included. Photographing the screen is safest — codes often differ by a single digit, and mixing them up leads somewhere else entirely.
Some codes clear after a screen restart or after the car sits locked for a few hours. If the code does not come back, it was usually a one-off glitch.
A one-off entry and a code that appears after every drive are two different things. It helps a service centre enormously if you know exactly when it shows up.
With airbags, brakes, steering and high voltage there is no point waiting it out. With the other groups you can watch and see whether the code returns at all.
Error codes are only part of the picture. For cars on TesList you also see battery health pulled straight from the vehicle, plus a price calculator that works out from current listings what a given car is actually worth today.