Well we replaced the clutch .It had worn down below the prescribe limit,as read on the live data on the star tester. After setting up the new clutch the vehicle drove as it should all good . However the clutch release failed today and the same codes returned ,perhaps my previous diagnosis as correct after all,i think i will remove the unit and strip it ! Then again its only £ 815.00 plus for a new one !Ah wont the hell.