Code UI_a032 was reported by the “User interface” controller in the car. The letter “a” in the middle places it among entries of the alert type.
The application layer of the touchscreen. Most codes from here are everyday notices the car shows the driver — an open frunk, a door left ajar, a status message about some feature. They are not hardware faults.
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.
Indicates a modem power cycle took place due to cell internet-check failures.
Modem runs internet check every 600sec and a modem reset is triggered if internet connectivity remains unavailable for 3600sec
Ecall alert. Modem cellular test was failed
A SquashFS (file system) error was detected.
A cron job checking the syslogs and running every hour detected the pattern ' kernel: .* SQUASHFS error: '.
No SquashFS error was found in syslogs by the cron job.
A SquashFS error may cause a reboot cycle leading to a blank and unresponsive display.
info from manualUI_A006
Unable to detect a functional dGPU
Missing dGPU, dGPU malfunction or communication link issues preventing dgpu detection
dGPU is detected without any issues
A2B tried to discover nodes, and failed
NVMe Driver detected NVMe controller Timeout
System hang, potential data loss, and UI freeze
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.