[PGhiron]

Had a weird warning driving home today. Suddenly on the center dash I got an "Info" warning that the lane assist feature was unavailable. The warning kept saying click OK to acknowledge. It would then go away with a "I" showing on the right side of the dash. Then every 5 min or so it would pop back up. On two subsequent drives since then it has not reappeared, but the "weird" electrons are at work again.

 

[sciencegeek]

Have you checked these conditions
Jaguar Owner Information

 

[McRat]

Had a weird warning driving home today. Suddenly on the center dash I got an "Info" warning that the lane assist feature was unavailable. The warning kept saying click OK to acknowledge. It would then go away with a "I" showing on the right side of the dash. Then every 5 min or so it would pop back up. On two subsequent drives since then it has not reappeared, but the "weird" electrons are at work again.

Check the glass in front of the rearview mirror (cameras) and grill badge (radar) for contamination. This is common cause of LKA errors and is completely normal.
Note that Steering Assist will not work without the Adaptive Cruise set.