Any experience of fault code P2288 (fuel pressure too high)?

[Eeyore]

Does anyone have experience of code P2288 ‘Injector control pressure too high/Injector control pressure above expected level’ on a 2.7 diesel XJ (2009)?
Having recently had my rear brake lines replaced by the garage (involving fuel tank removal) I now have this fault code putting the car into restricted performance immediately on startup. First 50-60 miles of mixed driving were fine but now this code appears.
Is this a problem on the supply fuel pressure side or on the leak off/return side and where is the sensor that will be measuring it?
It could be totally unconnected, but I’ve never had this issue before so I’m thinking maybe it’s too much of a coincidence not to be somehow related to the tank removal/refitting?
The car has been back into the garage and they are confident that none of the pipes around the tank are damaged or restricted.
My iCarsoft i930 scanner live data tells me that the ‘fuel pressure’ fluctuates between 30,000 -44,000 Kpa at idle if that’s relevant at all to this.
Any advice on where to start looking would be appreciated please!

[Eeyore]

UPDATE

I got the car back from the garage after they checked and confirmed that none of the tank pipes were crimped or restricted and couldn’t see anything else amiss.

Having read plenty on Jag and Landrover forums about the issue I decided to start with a new fuel filter as they can get clogged enough to restrict the return flow back to the tank. I’m probably guilty of not changing it recently as I haven’t done many miles but it’s maybe 4+ years old.

Swapped the filter today and initially still had the same RP light immediately on startup plus the slight ‘misfire’ like anomaly. However, after a few restarts this seemed to improve, only going into RP when revved and later only when the throttle was blipped, even stalling a couple of times (but OK with a steady rise in revs).

I rechecked the fuel system pressure at idle, which is now fairly steady around 24800kPa. Prior to the new filter it was higher and varying wildly between 30000-43000kPa. Volume Control Valve is at 25% and Pressure Control Valve 11% at idle, which from what I read on the LR forums is about right.

As things seemed to be improving, I took it out for a road test. 5 miles of A roads, a 70mph 8 mile run along the dual carriageway and then back home. All seems fine, no RP light, smooth idle and no fault code logged.

My theory is that the filter was due for changing and the tank removal may have stirred up just enough detritus to block it to the point of causing a problem. I read on the LR forums that the PCV spring in the HP pump gets overridden by the high pressure in the system but ‘fixes itself’ when the pressure returns to normal so I assume that explains the gradual improvement from same problem to no fault after some time running with the new filter and at lower/normal system pressure.

Happy that it seems fixed for now 🙂