I have a range rover l322 td6 i never raise or lower the suspension on vehicle but for the last six months the air suspension inactive has frequently been displaying on the dash, cleared it back again. I took it to my friends garage checked all four air suspension sensor arms free and working...

Ive got a Range rover l322 2003 with air suspension inactive displayed on the dash, taken it for a diagnostics test and it is reading as:- air suspension rear n/s to much energy, any ideas where to start the fix