I have a volvo S60 diesel for 10 months (more than 30.000 Km), and I already have to clean the oxygen sensor once and seems that I have to clean it again.
My question is what can I do to reduce the frequency of these clean ups, since I have to leave the car in the garage for the whole day.
Do I have to replace it ?
Must I change my driving style ?
Must I use a different fuel ?