Home >> Volvo >> 2013 >> XC90 Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control Module (ECM) Diagnostic Trouble Codes - 2 Of 13 >> ECM-24BD: Front Heated Oxygen Sensor (Ho2S), Bank 1. Signal Too Low (B5254T2; 2005-2007) >> Signal Too High / Signal Too Low