Hey, was just gearing up to sell my 03 Disco, and am having some issues with the air suspension. For the record, the bags are about 4 months old Arnott airbags. When I have the truck in standard height, the suspension sags a lot on one side. When I raise the truck into the offroad height, the airbags inflate properly and evenly and it DOES NOT lose air.

Is something wrong with the configuration? One time when I went to raise the truck I got a suspension fault error, but it went away and I haven't had it since.

Could it be a ride height sensor?

 

Additionally, when I drive over 20mph with the airbags fully inflated (offroad mode), the truck stays in offroad mode... Strange

 

Bump!!!

 

Sounds like a height sensor or valve block.