Home >> Volvo >> 2009 >> V50 Base, 2.4 39 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control Module (ECM) Diagnostic Trouble Codes - 1 Of 9 >> ECM-126B: Boost Pressure Sensor. Signal Too Low (B5254T3; 2005-2007) >> Diagnostic Trouble Code (DTC) Information ECM-126B >> Signal Too High / Signal Too Low