Home >> Volvo >> 2002 >> S60 Base, 2.4 61, Standard >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control Module (ECM) - Diagnostic Trouble Codes And Associated Procedures - 2 Of 14 >> ECM-2100: Front Heated Oxygen Sensor (Ho2S). Current Too Low (B5244S6; 2003-2004) >> Current too low