Code DI_u017 was reported by the “Drive inverter” controller in the car. The letter “u” in the middle places it among entries of the user action required type.
The Drive Inverter — the power electronics that drive the motor. Codes from here show up as reduced power, a message about limited acceleration or, in worse cases, an inability to drive. Temperature codes are common too: the inverter protects itself under sustained load.
Not a defect. The car is waiting for you — press the brake, close a door, top up a fluid, change a setting.
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 indicates that the tire and wheel setup has changed from a square (equal diameter) set to a staggered (different diameters) set or vice-versa. For example, if 19" wheels are installed on a P85+, this alert will be triggered. Currently (2.2.140), it is not shown to the customer, but that may change when more data has been collected.
The alert contains information about what the fitment was changed to. The alert is not set if the module reasserts the same tire fitment or when the wear factors get reset to default for other reasons, such as EEPROM corruption, etc. The alert shall only be set once per key cycle. This is controlled by the tire detection algorithm, not the alert specific code. The silent user alert will not clear, with exception of a power cycle, meaning there is no clearing logic in the code.
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.