Hi, Thanks for using JustAnswer.

Well this light is indicating a fault in your system, If you dont have any air leaks (not common) then you should be able to continue driving the vechicle for a week or so with no problems other than the air suspension will not adjust. But if you do have a small air leak then the vechicle could lower to its bump stops in which case you will probably require a tow, since driving it in this state would be very uncomfortable and a bit dangerous.

If your Range Rover Sport is supercharged or has the dynamic responce sway bar system this light can also indicate faults with this system, In which case the sway bar becomes "locked" and you wont quite have the same handling performance as usual, but the vechicle will be safe to drive (basicly you will not get the high performance corning cababilites that this system controls)

I hope that helps, if you have any concerns or want to cover something in more detail just reply back and I will do what I can

Thanks

Dave