Home >> Volvo >> 2007 >> V50 Base, 2.4 39 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control Module (ECM) Diagnostic Trouble Codes - 1 Of 9 >> ECM-120D: Intake Air Temperature (IAT) Sensor. Faulty Signal (B5244S4; B5244S7; 2005-2010) >> Diagnostic Trouble Code (DTC) Information ECM-120D >> Faulty Signal