Home >> Volvo >> 2004 >> S80 Base, 2.5 59, FWD >> Repair and Diagnosis >> Electrical >> Gauges >> Audio Module (AUM) & Phone Module (PHM) Diagnostic Trouble Codes >> AUM-4403: 4 Disc Cd Changer. MD/Cd Servo Fault. Permanent Fault (1999-2001) >> MD/CD servo fault. Permanent fault