Home >> Volvo >> 2004 >> S40 Base, 2.4 38, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control Module (ECM) Diagnostic Trouble Codes - 1 Of 10 (544 Body) >> ECM-120D: Intake Air Temperature (IAT) Sensor. Faulty Signal (B5244S4; 2004-2010) >> Faulty Signal