Driver Assistance Features Temporarily Disabled
What does TESLA-UI_W012 mean?
The TESLA-UI_W012 (Tesla UI Controller) EV fault code means: Driver Assistance Features Temporarily Disabled. This is a moderate severity code.
Common Symptoms
- Autopilot or Full Self-Driving (FSD) greyed out on the touchscreen and cannot be engaged
- Gray steering wheel icon displayed in the instrument cluster instead of the normal blue
- Traffic-Aware Cruise Control (TACC) unavailable or missing from the drive controls menu
- Auto Lane Change, Autosteer, and Navigate on Autopilot are all unresponsive
- Yellow or orange banner across the top of the touchscreen reading 'Driver Assistance Features Reduced' or similar
- Features return temporarily after a soft reset but fault comes back within a few drives
- One or more camera views missing or showing a black/gray feed in the camera display
Probable Causes (Ranked by Likelihood)
- Temporary UI controller software glitch or memory fault causing AP feature flags to clear Very Likely
- One or more Autopilot cameras offline, obstructed, or returning an error that blocks AP engagement Likely
- Upstream AP controller fault (AP node crash or CAN communication timeout between UI and AP ECU) Likely
- Over-the-air (OTA) software update partially applied or interrupted, leaving UI and AP firmware versions mismatched Possible
- Forward-facing radar (on pre-Vision models) or ultrasonic sensor reporting a fault that propagates to the UI layer Possible
- Loose or corroded connector on the Autopilot computer harness causing intermittent CAN communication loss Less Likely
- Autopilot computer (HW2.5 or HW3/HW4 board) internal hardware failure requiring replacement Less Likely
Step-by-Step Diagnostic Procedure
Start with a soft reset: hold both scroll wheel buttons on the steering wheel simultaneously for 10-15 seconds until the touchscreen goes dark and reboots. Wait for the car to fully restart, then check whether Autopilot re-engages. This clears the majority of UI_w012 cases caused by software glitches.
If the fault returns after the soft reset, perform a hard reboot: put the car in Park, press the brake pedal, then hold both scroll wheels AND the brake pedal together for 10-15 seconds. This performs a deeper controller reset.
Check all camera feeds by tapping the camera icon on the touchscreen. Look for any camera showing black, gray, or a 'Camera Temporarily Unavailable' message. A single bad camera feed is enough to pull down all Autopilot features. Note which camera is affected.
Physically inspect all exterior cameras (front fascia, B-pillars, rear, and roof line) for physical damage, heavy dirt, ice, or condensation fogging the lens. Clean each lens with a microfiber cloth and re-check. On Cybertruck, also check the sail pillar cameras.
Connect a Scan My Tesla app or TM-Spy app using an OBDLink MX+ or Veepeak adapter plugged into the OBD port under the dash. Pull the full fault list. Look for any active AP, VCFRONT, or camera-specific DTC codes alongside UI_w012. Those companion codes will point to the real root cause.
Check whether a pending or recently installed OTA update is shown in the Software tab of the touchscreen menu. If an update is queued or was recently installed, allow the full install to complete, then reboot. Mismatched firmware versions between UI and AP nodes are a known trigger.
If you see AP node codes or the AP computer is not visible on the CAN network in Scan My Tesla, inspect the Autopilot computer connector in the front trunk area (frunk). On Model 3 and Model Y, the AP computer sits behind the frunk liner. Check for moisture ingress or loose connectors. This step requires basic hand tools and is at the edge of DIY territory.
If soft resets, camera cleaning, and OBD scanning do not resolve the fault and companion AP codes are present, the Autopilot computer itself may need replacement or reflash. This requires Tesla Toolbox 3 access and is dealer or advanced independent shop work.
Frequently Asked Questions
What does Tesla code UI_w012 mean?
It means the UI controller has disabled Autopilot and driver-assistance features because it detected a fault either within itself or in a connected system like a camera or the Autopilot computer. Think of it as the car's software putting up a safety gate: it won't let you use Autopilot until it knows every sensor and controller it depends on is working correctly.
Can I still drive the car with UI_w012 active?
Yes, you can drive normally. Manual steering, braking, and all basic vehicle functions are unaffected. What you lose is Autopilot, Autosteer, TACC, and related features. The car is safe to drive to work or to a shop, just without driver-assistance features until the fault is cleared.
Will a soft reset fix UI_w012?
It fixes the majority of cases, especially first-time or occasional occurrences. Hold both scroll wheels on the steering wheel for 10-15 seconds. If the code comes back within a day or two, the root cause is a hardware issue like a failing camera or Autopilot computer and a soft reset is only masking the problem temporarily.
How much does it cost to fix Tesla UI_w012?
If a soft reset fixes it, the cost is zero. Cleaning a dirty camera is free. If the root cause is a failed camera module, parts and labor typically run $300-$800 at an independent shop. If the Autopilot computer itself has failed, expect $1,000-$2,500 depending on whether you have HW2.5, HW3, or the newer HW4 hardware.