Tesla Y Owner's Manual page 121

• Model Y is not traveling within the speeds at which
the Lane Assist feature is designed to operate.
• One or more of the ultrasonic sensors (if equipped) is
damaged, dirty, or obstructed (such as by mud, ice,
or snow, or by a vehicle bra, excessive paint, or
adhesive products such as wraps, stickers, rubber
coating, etc.).
• Weather conditions (heavy rain, snow, fog, or
extremely hot or cold temperatures) are interfering
with sensor operation.
• The sensors (if equipped) are affected by other
electrical equipment or devices that generate
ultrasonic waves.
• An object mounted to Model Y (such as a bike rack or
a bumper sticker) is interfering with or obstructing a
sensor.
• Visibility is poor and lane markings are not clearly
visible (due to heavy rain, snow, fog, etc.).
• Lane markings are excessively worn, have visible
previous markings, have been adjusted due to road
construction or are changing quickly (for example,
lanes branching off, crossing over, or merging).
WARNING: The lists above do not represent every
possible situation that may interfere with Lane
Assist features. There are many reasons why Lane
Assist may not operate as intended. To avoid a
collision, stay alert and always pay attention to the
road so you can anticipate the need to take
corrective action as early as possible.
Active Safety Features
Lane Assist
119