Touchscreen Wi-Fi Connection Lost
What does TESLA-UI_A014 mean?
The TESLA-UI_A014 (Tesla UI Controller) EV fault code means: Touchscreen Wi-Fi Connection Lost. This is a minor severity code.
Common Symptoms
- Touchscreen shows a Wi-Fi icon with an X or no bars in the status bar
- Over-the-air software updates stop downloading or never start
- Spotify and streaming apps buffer more than usual or fail to preload content
- Navigation map tiles load slowly or show blank areas when you drive into a new region
- Wi-Fi network name disappears from Controls > Wi-Fi even though your router is nearby
- Sentry Mode footage fails to upload to your Tesla app if you use that feature
- Phone hotspot you previously connected to no longer auto-connects
Probable Causes (Ranked by Likelihood)
- Saved Wi-Fi network credentials changed (router password reset or SSID renamed) Very Likely
- Cabin Wi-Fi antenna connector loose or disconnected, often disturbed during windshield replacement Likely
- Router moved, signal too weak at parking spot, or 5 GHz band not reachable from garage Likely
- MCU firmware glitch causing the Wi-Fi radio to drop saved profiles after a software update Possible
- Damaged or pinched Wi-Fi antenna coax cable routed along the A-pillar or headliner Possible
- Wi-Fi module hardware fault inside the MCU2/MCU3 infotainment assembly Less Likely
- Interference from nearby 2.4 GHz or 5 GHz sources overwhelming the cabin antenna Less Likely
Step-by-Step Diagnostic Procedure
Open Controls > Wi-Fi on the touchscreen and check whether your home network appears in the available networks list. If it appears but shows a lock icon with a red slash, the saved password is wrong. Tap the network, select Forget, then re-enter your current Wi-Fi password.
Check your router admin page or phone Wi-Fi settings to confirm the SSID and password match exactly what you entered on the touchscreen. Tesla Wi-Fi is case-sensitive.
Move your car to within 20 feet of your router and retry. If the network shows full bars and connects, you have a range or signal issue. Consider a Wi-Fi extender in your garage pointed at where you normally park.
If the car was recently in a body shop or had windshield work done, inspect the headliner near the A-pillar on both sides for any trim panels that are not fully snapped back in. The Wi-Fi antenna cable routes behind the headliner and its small push-on connector at the MCU can be knocked loose. This is a moderate job to access but worth checking if signal is weak across all networks.
Perform a soft reboot by holding both scroll wheel buttons simultaneously for about 10 seconds until the screen goes dark and the Tesla logo appears. After reboot, go back to Controls > Wi-Fi and try reconnecting. A soft reboot clears transient firmware glitches without affecting saved settings.
If rebooting does not help, try a factory Wi-Fi reset by going to Controls > Service > Factory Reset Wi-Fi (available on some firmware versions). Note that this erases all saved networks. Re-add your home network afterward.
Use Scan My Tesla with an OBDLink MX+ or Veepeak adapter to check for any related UI fault codes logged alongside UI_a014. A cluster of UI network codes can point to MCU hardware failure rather than a simple antenna or credential issue.
If none of the above steps restore a stable connection and the antenna connections check out, the Wi-Fi radio inside the MCU2 or MCU3 assembly may have failed. At this point you need Tesla Toolbox 3 or a Tesla service appointment to run a full infotainment diagnostic and determine whether the MCU requires replacement.
Frequently Asked Questions
What does Tesla code UI_a014 mean?
UI_a014 means the touchscreen lost its connection to the Wi-Fi network it had saved. This affects over-the-air software updates, which require Wi-Fi for large update packages, and streaming app caching like Spotify. The car still drives and charges normally. You fix it by going to Controls > Wi-Fi and reconnecting to your network.
Can I still drive my Tesla with this code active?
Yes. UI_a014 is informational only and does not affect driving, charging, Autopilot, or any safety system. You will just lose Wi-Fi dependent features like background software downloads and streaming preloads until you reconnect.
How much does it cost to fix UI_a014?
Most of the time this costs nothing. Re-entering your Wi-Fi password or moving closer to your router solves it. If a windshield replacement knocked the antenna loose, a body shop reseating the connector should be free. If the MCU Wi-Fi radio has actually failed, expect $1,200-$1,800 at a Tesla service center for MCU replacement.
Will my Tesla still get software updates without Wi-Fi?
Small updates can arrive over LTE using your car's built-in cellular connection, but Tesla routes large full-version updates over Wi-Fi only. If UI_a014 persists and you do not fix it, your car may fall behind on software updates until you restore the Wi-Fi connection.