Home >> Volvo >> 2009 >> S60 Base, AWD >> Repair and Diagnosis >> Electrical >> Body Electrical >> Central Electronic Module (CEM), Rear Electronic Module (Rem), Upper Electronics Module (UEM) - Diagnostic Trouble Codes - 1 Of 13 >> AEM-5F10: Relay, Engine Block Heater. Signal Too Low. Permanent Fault (2001-2009) >> Signal too low