Home >> Volvo >> 2003 >> S80 Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control Module (ECM) Diagnostic Trouble Codes - 9 Of 11 >> ECM-700D: Engine Control Module (ECM), Internal Fault. Signal Too Low (B5254T2; B6294S2; B6294T; 2005-2006) >> Internal fault