Reaching out to the RR forum and community... I have had this message appearing intermittently now for about 12 months on a RR Super 05 plate... so far the following work has been completed to remedy this issue although following the latest replacement of the Air Suspension ECU it has appeared again within 24 hours.

1. Compressor replaced.
2. Front Offside air bag replaced.
3. Rear sensor replaced.
4. Wiring to all 4 sensors replaced.
5. Air Suspension ECU replaced.

This work has all been done by a 'specialist' RR garage, who I believe to be 100% honest in all that they do.

I have attached error codes and the display from the dash... I would appreciate anyones thoughts on this as I am loosing the will to resolve this.

Thanks for all your help...

Click image to enlarge

Has your specialist had a look at the valve blocks or the reservoir? As the fault is not pointing to a "corner" would have thought a central part of the system might be the cause. Why only one sensor replaced? Have they tried swapping out the others? .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999