Home >> Volvo >> 2004 >> S80 Base, 2.5 59, FWD >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> AEM, CEM & Rem Diagnostic Trouble Codes - 8 Of 12 >> CEM-6C49: Transponder Communication. Signal Faulty. Permanent Fault (1999-2004) >> Signal missing/faulty