error code e40 still when new lock fitted?

i have a zanussi fdjr1666w washing machine.it said error code e40 so looked on net and was told it was code for door lock so brought a new lock and it was fitted and still it says code e40 when turned on.some one said that you need a new code when you put something new in from zanussi but also that they dont give it out?or could control panel be broke?thanks sam