Home >> Volvo >> 2007 >> S60 Base, AWD >> Repair and Diagnosis >> Electrical >> Body Electrical >> Central Electronic Module (CEM), Rear Electronic Module (Rem), Upper Electronics Module (UEM) - Diagnostic Trouble Codes - 8 Of 13 >> CEM-8D01: Ignition Switch Lighting And High-Mounted Stop Lamp (Led). Signal Too Low (2004) >> Signal too low. Permanent fault