Checking cables

Check signal cable between heated oxygen sensor (HO2S) #2 and control module #A35 (#A35) for an intermittent short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults .

Other information

Connecting the breakout box/accessing the control module, see Connecting the breakout box .
To access/replace the heated oxygen sensor (HO2S) for 5 cylinder engines, see Replacing lambda probes .
For information about signals, see ELECTRICAL SYSTEM

Fig 1: Identifying Heated Oxygen Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Voltage Display

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying Rear Heated Oxygen Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.