Disco 3 (LR3) Height Suspension and DSC Alarms

Hi there, hoping someone out there can help. We purchased the above 5 months ago and have since had a saga of alarm problems. Firstly we had the brake alarm and the height alarm light on constantly. The brake light was solved with new rear brake sensors but the height one remained. We then fitted four new tyres and a new AMK air compressor (replacing like for like). We are living in France and the car ended up standing for 2 months as we were having trouble with insuring it. That was solved and we have been using it for the last 6 weeks. Since driving again when we start the car she is fine - we drive down the road and the height, DSC and Brake warning light come on and the ABS traction control goes into operation for a matter of minutes. She then goes down to flat position. We have measured the heights of all the wheels from ground to wheel arch and in both flat and normal mode the rear passenger side is significantly higher 3 -4 cms. Any advice much appreciated.

Get the fault codes read it will give you a clue where to look