the code they requested is the emergency start code, this will bypass the immob. you can request it from the dealer, however you usually dont need it if you have the red key, unless there is a fault with the immob.
if the key code light is remaining lit it means the immob is not switching off so the engine will not start. this happens when the blue key codes are 'lost' by the codebox, which can happen when you disconnect the battery. the red key is the master key, its code can not be lost by the codebox. if your red key starts the car you can use the red key to teach the codebox the blue eky codes, then the blue keys will work again, however you must have at least 2 blue keys to do this, you cant teach the codebox only 1 blue key code. the procedure to teach your codebox the blue key codes is this:
insert red key, turn to on posititon (mar i think its called?)
keycode light will illuminate then go out
remove red key
insert 1st blue key, turn to on positon
keycode light will illuminate then go out
remove 1st blue key
insert 2nd blue key, turn to on positon
keycode light will illuminate then go out
remove 2nd blue key
insert red key, turn to on posititon
keycode light will illuminate then go out
remove red key
you need to swap keys over quickly, you only have a few seconds.
alternatively, if you find the red key doesnt work and it wont start with the red key, it means there is a fault in the immob.
the most common causes are:
-aerial around ignition barrel is faulty or its connector is loose
-codebox (near interior fusebox) is faulty or its connectors are loose
-immob ecu is faulty or its connector is loose
-immob ecu is not getting power (blown fuse, rusty fuse terminals, damaged wire)
-codebox has lost blue key codes and need to be taight them using the red key (can happen if battery left disconnected for some time or when certain electrical faults happen, such as when several fuses blow at once)