My Hymer has just cut out on me and the auto electrician has diagnosed the coding on the fuel pump needs decoding? has anyone else had this problem? if so what did it cost and did it solve the problem. I drove about 9 miles and the engine just cut out completely no lights on the ignition, and it seemed the battery was dead. Its been in the garage for 3wks now, everything has been checked and is fine. Apart from the fuel pump coding, I've no idea what this means. i just hope this does not cost a fortune. Any advice would be grateful. Thanks.