Land Rover Repair: Air Suspension, land rover discovery, air spring

Question
I have a 2000 Land Rover Discovery and the back suspension has been dropping lately. Usually i can pump it back up with a button on the dash,  but I think I took it too far. To day it dropped and it wont come back up. The check engine light has also been coming on. I dont know if that would have any thing to do with it. Please help.

Answer
It will be the air spring 100%. You only can check it if you  can blow it to hard as stone, and spray it with some effervescent material.

But trust me it will be the spring. It's hard too find the exact position of the air leakage, but I'm sure.
They gets porous after 6-7 years.