Incorrect Map Data
The TESLA-UI_A011 (Tesla MCU (Media Control Unit)) EV fault code means: Incorrect Map Data. This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $0 soft reboot (DIY). 12V battery replacement $80-$150 DIY or $200-$300 pro. MCU1 eMMC repair by a specialist shop $300-$500. Full MCU1-to-MCU2 upgrade (Tesla authorized) $1,500-$2,000 installed.
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Common Symptoms
- Alert UI_A011 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_A011. Tesla's firmware identifies this alert as "UI_a011_IncorrectMap" — the navigation system reporting incorrect or mismatched map data. High
Frequently Asked Questions
What does UI_A011 mean?
Incorrect Map Data. Tesla's firmware identifies it as "UI_a011_IncorrectMap".
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 S (LR) built 2012-2018 with MCU1 hardware
- Tesla Model X (LR) built 2016-2018 with MCU1 hardware
- Tesla Model 3 (RWD, Long Range AWD) built 2017-2020 on early MCU2 hardware
- Tesla Model Y (LR AWD) early 2020 production on MCU2 hardware
- Tesla Model S (LR, Plaid) post-2021 on MCU2.5 hardware (less common but possible)
- Tesla Model X (LR, Plaid) post-2021 on MCU2.5 hardware (less common)
- Tesla Cybertruck (AWD, Cyberbeast) on latest MCU generation (rare, typically OTA-resolvable)
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