Update :- Took the car into Lexus Carlisle yesterday for the diagnostic report and it came back with 2 code errors, 1 to do with the Cat but i'm not sure about the other.The engine is getting rebuilt from scratch including a new cylinder block,Cat system,EGR,Air flow metre etc,etc.Lexus have said they'll cover the cost (although i have to pay for the coolant which i certainly wont contest). The car has full service history (not all with Lexus, which they were'nt suited about)Which is a must otherwise i would have ended up with a bill between £5000 & £6000.Iam over the moon with Lexus and will not be going anywhere else for my next car.