I'm having this issue myself, I get C1119-09. I suspect I caused this, a mechanic who looked at the car mentioned I was low and I should top up the ACE fluid (I told him about getting intermittent yellow warnings for it). I topped it off, but like an idiot did it up to the top, rather than the max line. Shortly thereafter it failed while flexing on trail. I replaced the valve block filter and flushed the reservoir to empty a few times (reservoir is a somewhat dirty and probably a candidate for replacement according to the guide in the TSB) but I am still getting the issue.
I had a shop run the dynamic response test on the car and it looked like the majority of lines had 0 bar pressure and one had maybe 40ish bar.
The guide suggests replacing the pressure control valve if you can't get 50 bar pressure but it costs ~$220 and I'm trying to get this fixed asap since I have the week off (and want to go test my new sliders in moab). I found a local LR junkyard that has the whole hydraulic pump assembly (sorry if this is the incorrect term) for $200 used. It seems like the only other options are the reservoir filter (kinda dirty but more flushing should continue to clean it) or the actuators (I lost my wheel lock key last week and am waiting for the mailed replacement, so a shop couldn't do these for me yet anyhow). My assumption is that any shop would do the PCV first anyways so I'm thinking I will replace the whole pump and if that doesn't fix it, get a shop to run diagnostics and see what they recommend. Any advice welcomed. I don't believe this is leak based and haven't noticed any.