A failed vehicle height sensor can cause deactivation of the air suspension.Google+
Car Problem Reports
Land Rover LR3 Defective Vehicle Height Sensor May Deactivate Air Suspension
Land Rover LR3 Problem
Average Mileage: 90,304 mi (45,000 mi - 135,000 mi)
Suspension light on (car with arrows arching over car and below yellow car. System information says Suspension Fault, not able to raise or lower car.
Last time this light came on (a little over a year ago) the Land Rover Dealer told me the air suspension system was clogged..or some thing along those lines....Replacing this was around 2k.
Visitor, 2005 Land Rover LR3, 45,000 mi
Suspension amber light came on. Repair made for 2k. Less than 1 year later, same thing is happening
Visitor, 2005 Land Rover LR3, 73,000 mi
defective vehicle height sensor
Visitor, 2006 Land Rover LR3, 83,542 mi
Suspension light is on, and can not use to turn it down or up . still driving good but dont know why is this failure?
Visitor, 2005 Land Rover LR3, 121,000 mi
Defective vehicle height sensors deactiveate air suspension. indicator light and message to not exceed 30km per hour. expensive to repair!!!
Visitor, 2007 Land Rover LR3, 106,500 mi
Vehicle Height Sensor light has been on for months. My service guy put new tires on and could not do the alignment due to this problem. He said I have to go to the dealer. Going to watch tire wear at oil change and watch. These sensor lights can drive you crazy! Also, my gas gauge is broken and to fix is $350, so I just fill up every 325 miles, no problem.
Visitor, 2006 Land Rover LR3, 110,000 mi
Same issue as others "height fault"
Visitor, 2005 Land Rover LR3, 135,000 mi
defective height sensor. replaced and fixed.