it means that the electric motor that assists the steering has gone faulty (£££££££s) i had the same problem on my wifes car but it was intermittent and when it stopped working i would switch off the engine and start it again and it would ok for a few months. the car had only done 55000 miles and was a money pit, problem after problem my advice is get rid of it before it costs you a fortune. good luck
Firestarter, January 2011