ok thanks,
Dealer has had the car for a week and not diagnosed the fault yet, they thought it may be a clogged dpf and gave it me back to give it a blast down the motorway,
i ran it as recommended to clean the dpf, the car kicked out loads of white smoke then cleared up after a few minutes, i cleared the faults using a handheld reader which turned off the 'check ignition' light, it was fine for the rest of the day and the next, but then the check ignition came back on last night..
its back to the dealers again now who are at best useless... they say they need to take it for a run!
any ideas to what the fault may be?