Honda Civic Owners Manual: Lane Departure Warning Function

Lane Keep Support Function

Provides assistance to keep the vehicle in the center of the lane. When the vehicle nears a white or yellow line, steering force of the electric power steering will become stronger. ...

When the System can be Used

The system can be used when the following conditions are met.  The lane in which you are driving has detectable lane markers on both sides, and your vehicle is in the center of the lane. ...

See also:

Honda Civic Owners Manual. Warranty Coverages
U.S. Owners Your new vehicle is covered by these warranties: New Vehicle Limited Warranty - covers your new vehicle, except for the emissions control systems and accessories, against defects in materials and workmanship. Emissions Control Systems Defects Warranty and Emissions Performance Wa ...