July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Replacing The Component

Fig 1: Identifying Ignition OFF

GLL101045

Courtesy of VOLVO CARS CORPORATION

Ignition off.
The control module has registered a fault in the heated oxygen sensor (HO2S). Try a new heated oxygen sensor (HO2S).
- For B5xx4T, see HEATED OXYGEN SENSOR (HO2S), REPLACING
- For B6xx4T, see HEATED OXYGEN SENSOR (HO2S), REPLACING .
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Fig 2: Front Heated Oxygen Sensor
Courtesy of VOLVO CARS CORPORATION

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