Code APP_w225 was reported by the “Autopilot — application layer” controller in the car. The letter “w” in the middle places it among entries of the warning type.
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The application layer of Autopilot. Drives adaptive cruise control, lane keeping, lane changes and sign recognition. Faults here usually mean an assistance feature switched itself off temporarily — typically due to poor visibility or incomplete camera calibration.
The car is flagging that something is not right. Driving is usually still possible, but some function may be limited.
This is the message the car shows the driver when the code occurs. It comes from Tesla's official alert list and we leave it in the original English — this is exactly how it appears on the display.
Source: official Tesla document “Model S Alert Codes” (2018)
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.
Acc unavailable - camera pitch is out of bounds
Would required re-calibration of cameras
New left repeater camera calibration values are available
New left repeater camera calibration is available
AP board disk usage is over a threshold
AP filesystem usage goes over predefined thresholds
Disk usage falls below threshold
Log files will be missing, some critical snapshots may be missing
Can be set on UI request or DI (Drive Inverter) / PARK ECU autopark state machines timed out
When autopark is disabled e.g. vehicle goes over a certain speed
User has to manually complete parking
This part is written by you. If you have had code APP_w225, tell us when it appeared, what brought it on and how it ended — for the next person, one such sentence is often worth more than the entire service documentation.
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Comments are written by visitors to this site. They are not advice from Tesla or from TesList and we do not verify them — treat them as one person's experience with one particular car.
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.