Code GTW_f359 was reported by the “Gateway” controller in the car. The letter “f” in the middle places it among entries of the fault type.
The Gateway — the hub through which the car's controllers talk to each other, and the route software updates take. Codes from here often mean some controller has gone quiet on the bus; the real fault is usually in that controller, not the gateway.
The more serious level. The affected component has shut down or is running in limp mode. These codes belong in a service centre.
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.
This alert will be raised if the gateway (GTW) sees any of the following channels reported faulted by the E-fuse via the Efuse_status message on BDY bus:
EFUSE_fault_DCDCEFUSE_fault_RevBatt (This is the E-fuse on the E-fuse module connecting the 12V battery to the rest of the system)EFUSE_fault_Frunk BECEFUSE_fault_Cabin BEC
This alert will prevent 12V support, high voltage (HV) Charging and Drive.
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.