Home >> Volvo >> 2009 >> XC90 Base, AWD >> Repair and Diagnosis >> Electrical >> Body Electrical >> Accessory Electronic Module (AEM) And Central Electronic Module (CEM) - Diagnostic Trouble Codes - 1 Of 2 >> CEM-5F13: Relay, Auxiliary Heater. Signal Too Low. Permanent Fault (B5254T2; B6294T; 2003-2004) >> Diagnostic Trouble Code Information