WIDL102 flashing leds no 2,4 and 5?

My indesit WIDL102 won't finish its cycle. It halts halfway through (whilst still containing water) and the easy iron, 1000-500 spin speed, and door lock leds flash. (number 2, 4, and 5 respectively counting from the left.)

I can end the program by holding in the start button, and I can start it again, but it always halts with the same error. (Presumably at the same point.)

Any ideas what could be wrong with it. It is 13 months old.