Hi I have an sx 1.1 which caused me no end of bother.In the end I replaced the crankshaft sensor (£32) and bingo its a new car.A lambda sensor for one of these is £56 and it has 2.The one in the pre cat (behind the heatshield) requires removal of the shield to get at.The crankshaft sensor is at the base of the engine and requires the removal of the drivers side wheel and wheelarch cover to get at.It plugs in at the top of the engine to the left of the air filter box.I dont know if this of any use to you but I hope so.Pray your clutch cable never snaps because thats a whole new story...:bang: