Touchscreen Error
The TESLA-UI_A008 (Tesla UI Controller) EV fault code means: Touchscreen Error. This is a moderate severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- easy
- Estimated cost
- $0 for a server sync or software reboot fix (most cases). If the FSD computer hardware has failed, replacement runs $1,500-$3,500 at a Tesla Service Center. Independent shops with access to Tesla Toolbox 3 may charge $800-$2,000 for the same repair.
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Common Symptoms
- Alert UI_A008 shown on the touchscreen
- The vehicle may log the alert without any change the driver notices
Probable Causes (Ranked by Likelihood)
- The vehicle reported UI_A008. Tesla's firmware identifies this alert as "UI_a008_TouchScreenError" — an error reported by the centre touchscreen. High
Frequently Asked Questions
What does UI_A008 mean?
Touchscreen Error. Tesla's firmware identifies it as "UI_a008_TouchScreenError".
Can a generic OBD2 scanner read this?
No. Tesla alerts are a manufacturer-specific system and appear in no SAE standard, so a generic OBD-II scan tool cannot read or clear them. The alert text on the touchscreen and the Tesla app are the authoritative sources.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
Read the alert text on the touchscreen exactly as shown — Tesla's own wording is more specific than any third-party list, this page included.
Check for a Tesla service bulletin or a pending software update; a number of alerts clear on their own after an over-the-air update.
If the alert persists, request service through the Tesla app. Tesla alerts are not standard OBD-II codes and a generic scan tool will not read or clear them.
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- Tesla alert dictionary (canonical firmware alert identifiers)community-maintained dictionary, not an official manufacturer document
Commonly Affected Vehicles
- Tesla Model 3 (Long Range AWD) -- HW3 FSD computer, most common platform for UI_a008
- Tesla Model Y (LR AWD) -- high FSD adoption rate, frequent post-update flag resets
- Tesla Model 3 (Performance) -- same UI controller stack as LR AWD
- Tesla Model Y (Performance) -- FSD Beta widely deployed on this trim
- Tesla Model S (LR) -- HW3 and HW4 variants both susceptible after major OTA updates
- Tesla Model X (LR) -- reported after 2023-2024 FSD v12 rollout updates
- Tesla Cybertruck (AWD) -- HW4 platform, early FSD Beta deployment, flag mismatches documented in 2024
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