Freelander 2 (LR2) Fault code p2562

Can someone please help to advise the solution to this fault code? My car goes into limp mode whilst the engine is in idle position, waiting at traffic lights or a roundabout, it re-sets when I stop, remove the key then start again. Really need some good advice as to what the actual fault could be before spending a fortune. I tow my horse trailer and can't do that until this fault is fixed as it is quite dangerous to have 1600kg behind you with no power

thank in advance for quality advice

As an addition to the above I know what the fault code says, it’s turbo boost sensor fault, what I am asking is what actually requires fixing on the turbo to resolve the engine fault, before I spend a fortune with the garage
Thank you

Locate the boost sensor in the turbo, check wiring, clean contacts, if it still persists then the sensor will need to be replaced, trouble is it could be a general code which masks a different problem