Home >> Volvo >> 2004 >> S80 Base, 2.5 59, FWD >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> AEM, CEM & Rem Diagnostic Trouble Codes - 1 Of 12 >> AEM-4F60: Back-Up (Reversing) Warning System. Signal Too Low. Permanent Fault (2001-2004) >> Signal too low