Yesterday my 2008 TDV8 started playing up and had the same issue today. All starts fine, the car does its system check and all ok. Start driving and within less than twenty seconds the car starts to try and brake itself (when my foot on accelerator) (Revs stay up as normal) and after a few attempts trying to brake the warming lights come on and says HDC special programs disabled and suspension height lowered.
Any ideas?

Plugged into the garage today and it says steering angle sensor?

Car has done 25000 miles and still on original battery - although I notice all other faults that suggest a battery change are a fault showing from startup and not while driving.

I might be wrong but i think i read somewhere that the reverse switch could cause this problem hope it helps

could be dodgy battery, but if the car tries braking itself, then I would say it points towards a faulty Brake Switch. Only about £20-£30

Does it give any message onthe dash when it tries braking such as Emergency Park Brake Activation (Or something like that) Bodsys Brake Bible
Software Updates Contact me
RRS Timed Heat/Remote kits - Contact me
BAS Engine Re-maps/ EGR Blank EuIII and EuIV
Clock On The Dash/ SNOTM /3Flash / BT Update /Service Reset/Error Codes read\ Gearbox Reset
See it HERE

Ian thanks for the module did you get the one i returned very happy the bluetooth works a treat

Hi,

Dont get any of those messages. I get three orange warning lights come in for brakes and suspension from memory.

This happened to me on the motorway doing 80mph when overtaking the car goes into a limp like mode. starts breaking, lowers itself ect and does all the exact same as yours. I have been fighting with the garage for weeks. they say its the fuel pump not letting enough fuel through, so it starts to turn all the special programs off and slows you down so you can get home safely. They 'fixed' the car and so far I have not had any more trouble. the other problems it could be is the EGR valve.

hope this helps, I am not sure if mine is fixed as I have only travelled 100 miles so far but drives a lot better and no problems yet. mine is a 57 plate covered 50k

Forgive me if im wrong as far as im aware the egr sticking at 80 mph wouldnt cause the car to slow as far as i know you only notice it when you start to drive as you accelerate there is basically nothing there foe a few seconds then all of a sudden it picks up speed but this may be depending if it sticks open or shut could anyone confirm this as im new to hear and new to owning a rrs so im trying to get as much info in my head as possible thanks pete

I have just gone on what two other separate LR dealers have told me. I spoke to the service manager at both to ask his opinion on what could cause the fault I had had and those were the two things they both said it could be.

I am a little sceptical to be honest lol

Jamie