Home >> Volvo >> 2009 >> XC90 Base, AWD >> Repair and Diagnosis >> Electrical >> Body Electrical >> Accessory Electronic Module (AEM) And Central Electronic Module (CEM) - Diagnostic Trouble Codes - 2 Of 2 >> CEM-8D01: Ignition Switch Lighting And High-Mounted Stop Lamp (Led). Signal Too Low (2004) >> Signal Too Low. Permanent Fault