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Home >> Volvo >> 2002 >> V70 Base, 2.4 61, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control Module (ECM) Diagnostic Trouble Codes (DTC) - 5 Of 14 >> ECM-2A1A: Rear Heated Oxygen Sensor (Ho2S) Aging Signal Too High. Permanent Fault (B5234T3; B5244T3; 2001) >> Signal too high. Permanent fault >> Replacing heated oxygen sensor >> Notes
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Replacing heated oxygen sensor: Notes

Try a new heated oxygen sensor (HO2S) for 5 cylinder engines according to Replacing lambda probes or 6 cylinder according to Heated oxygen sensors (HO2S), replacing .

Other information 

Fig 1: Identifying Rear Heated Oxygen Sensor
GLL102934Courtesy of VOLVO CARS OF NORTH AMERICA.