Cadillac Repair: emissions, vacuum hose, air management

Question
my 90 cad deville displays e48 what does this code mean? also can you send me a diagram of the vacuum hose routing for this same car

Answer
E48 = AIR systems fault. You have a problem with the AIR MANAGEMENT SYSTEM.

You will need a vacuum schematic and picture locations of the components within the system that is causing you problems of which can't be done on this website which only allows one picture. I do not have a website so you will have to e-mail: onlineautohelp@msn.com in order to obtain the information.

Is this a california car ?.