X5 Suspension problem

[Ian coutts]

Hi everyone I have not used this before so I hope I am in the right place. I have a 2001 X5 with 4 wheel air suspension. My slef leveling light keeps coming on even after it is reset by the tech's I see on here lots of people have had this problem, can anyone help with what should be done to correct this issue as my Tech can not get to the bottom of it as there is not enough information on the codes given.
Thanks

[Ian coutts]

Once again it has been reset, but after a few days turns off and I get the message on the dash. The light on the up & down switch also is off.
Is it possible that the module is faulty.
Has anybody had this problem?
Help please