Hi not sure if anyone can help or have had the same issue
I've had the suspension light come up on my 2005 Range Rover sport hse
Some times the light goes red and says 30mph max
I've got the 2 fault codes that the car had on it they are :

C1A20 pressure increases to slowly
C1A13 pressure dose not decrease when venting the gallery

I've been told that changing the suspension compressor will solve both faults
Has anyone had the same problem ? Any help appreciated thanks Mike

Yes me last week see here
http://www.rrsport.co.uk/forum/topic45468.html

I bet you all the money under the sun it will be the same issue a cracked end cap on your air compressor air dryer. Just spray some soapy water on it if you see bubbles, bingo!

Have a read here, everything explained
http://www.rrsport.co.uk/forum/topic38956....sion+fault

Thanks for all your help danv8 il take a look see if there is a crack up report back thanks mike

Good luck, use plenty of wd40 (or the likes of) on the 3 bolts that hold the bottom cover to the compressor on. The 2 chassis bolts on mine came out easily but the central bolt that goes up into the mounting bracket sheared off. When I was replacing all the parts I just drilled it out a tapped a new thread, but never bothered putting another bolt in its place, there's no way the cover can fall off with the other 2 and all the clips from the top part of the cover.