vechicle too low sign comes on

snow1544 , You have a air suspension fault. Have scanned for codes and checked for fault by a good technician. If you can hear the compressor run and the vehicle will not lift then there's an obvious leak, possibly air line, air bag, or maybe leaking O-rings at the bag solenoids. It could also be caused by an electronic glitch; ride height sensor, etc.

May get some info. from links below. Good luck.

I hope this helped you out, if so let me know by pressing the helpful button.

http://www.jaguarforums.com/forum/xj-xj6...

http://www.jaguarforum.com/showthread.ph...

http://www.jaguarforums.com/forum/xj-xj6...