My Zanussi washing machine displays E10 through cycle?

My Zanussi washing machine (Jet Stream 1400 XC) is fine until it gets to 39 mins from the end of the cycle, when the 2nd cycle of water comes into the machine. It then displays E10, the cycle continues if you press start but happens again every few minutes all the way through the rinse cycle. If you are lucky the washing finishes in another hour or more!!