Home >> Volvo >> 2007 >> S40 Base, 2.4 38, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control Module (ECM) Diagnostic Trouble Codes - 10 Of 10 (544 Body) >> ECM-A03B: Communication, Central Electronic Module (CEM). Faulty Signal (B5244S4; 2004-2010) >> Fault-Tracing Information