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Home >> Volvo >> 2009 >> XC90 Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control Module (ECM) Diagnostic Trouble Codes - 4 Of 13 >> ECM-2A1A: Rear Heated Oxygen Sensor (Ho2S) Aging Faulty Signal (B5254T2; B6294T; 2003-2004) >> Permanent Fault >> Replacing The Component

Replacing The Component

Try a new heated oxygen sensor (HO2S).

Other information 

Fig 1: Identifying Rear Heated Oxygen Sensor
GLL102934Courtesy of VOLVO CARS CORPORATION