Hello everyone!
Just minutes after buying my 2007 Freelander, I was driving my dad's 2008 Freelander on the highway, ~110km/h, ~2300rpm, constant speed. Suddenly I heard a sound like a blow-off valve and the rpm dropped at 1900. 5 seconds after pressing slow on acceleration, it did it again then I pulled off the road.
The car didn't display any error nor did the Autel AP200. Switched cars with my dad and driving behind him there has no smoke at all, but the car is fitted with DPF. The car made it home, driving 300km at speeds of 70-80km/h under 2000rpm, but it accelerated very very slowly.
The next day, it did enter Engine Performance Reduced mode and Autel showed me a turbo overboost error (I don't have access to the car right now, my bad I didn't screenshot the error).
Is this a problem related to the turbo hose? For me it acted like after reaching a certain pressure, something opened and released all of it.
The car is scheduled for service, but I'd like some opinions.

It will be a burst turbo intercooler hose.
Often it's the one at the top / front of engine which is easily changed. Mine has done this twice unfortunately the lower hose where you need to remove the bumper to get at it. Easy fix but will need the code clearing. Autel should do it. Landrover - turning owners into mechanics since 1948

2014 Orkney grey Freelander SD4 GS.
2004 Zambezi silver Discovery 2 Td5 (Gone)
1963 Surf blue Morris Mini Minor Super de Luxe (my little toy)

Were you in 5th gear? Mine runs at under 2000 RPM at 110kph.

As above, it'll be a boost hose. 2009 Rimini Red SE TD4. Soon to be sold.
Hyundai Ionic 5 Ultimate on order.
Gone. 2006 Tonga Green i6 HSE.

Yes, in 5th gear.
But also, I noticed my dad's FL is quite slower than mine, so it may not have all the horses it came with from the factory. And the fuel filter isn't a reason for this, we changed it a day before. Maybe the turbo was leaking boost before and we didn't notice or it has another problem, idk.

EDIT: Fortunately it was an inexpensive fix, some hose got out of place.