2008 LR3 Suspension dropping while driving

[Tigger1431]

2008 Land Rover LR3 HSE left front always drops while driving causing suspension fault, eventually resets itself. Seems to happen more during warm temperatures over 70 degrees. I have followed advice on the forum to raise truck and disconnect battery to determine if there is an airbag leak or a front valve block issue. Truck never dropped an inch. As stated only happens when truck is being driven. Could this be an issue with exhaust valve on the compressor occasionally being stuck open. Compressor seems to fill the reserve tank with no problems. Could this be a front valve block problem?
Can the front valve block be removed and cleaned? If it can any recommendations for a cleaner. Any advice is appreciated.

 

[stmcknig]

Advice I have seen on the UK forums is to look at the 4x4 display on the nav screen (if you have it) and watch to see if the height sensor indicator changes when you note the drop, this might indicate it's a faulty height sensor or connection which is making the suspension think it needs to adjust. If your suspension stays up over night I wouldn't expect a leak. Any fault codes you were able to read ?

 

[Tigger1431]

I do have the 4x4 display and it does show the left front wheel dipping down when suspension drops. It mostly happens to the left side but am starting to see more instances on the right side. I disconnected the sensors and took compressed air and blew out allot of sand and debris from the sensors, have these been known to foul without really going bad?
Hooked battery back up and truck has not self adjusted to where it is not level. Lets hope cleaning sensors was the fix or I will have to take to dealership to read codes to pinpoint the actual problem.

Thanks for reply