Checking the connector

Check the connector for the rear heated oxygen sensor (HO2S) (bank 2). Check for contact resistance and oxidation. Remedy if necessary.

Try a new rear heated oxygen sensor (HO2S) (bank 2) if the fault is not remedied.

Other information 

• To access or replace the heated oxygen sensor (HO2S), see Heated oxygen sensor (HO2S), replacing
• See Contents

Fig 1: Identifying Rear Heated Oxygen Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.

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  Refer to Verification