Volvo XC60 Check Engine Light and Rotten Eggs Smell Due to Catalytic Converter and O2 Sensor Issues on Volvo XC60

Some Volvo XC60 owners report experiencing a check engine light accompanied by a rotten eggs smell, which may indicate issues with the catalytic converter and O2 sensor. These owners note that symptoms of a clogged catalytic converter can include limited performance at higher speeds, irregular engine running, and poor fuel economy, alongside the unpleasant odor and illuminated engine light. The rotten egg smell is often linked to a malfunctioning catalytic converter, which fails to convert sulfur in gasoline properly. Additionally, an O2 sensor problem may also trigger the check engine light, suggesting the need for replacement if related codes appear. While the smell is frequently associated with catalytic converter issues, it can also stem from excessive sulfur in the fuel or combustion problems. Prompt attention to these emission system concerns is crucial for maintaining the vehicle's performance and addressing any potential risks.