What do you think?????? I had my Volvo S40 1998 model engine wash, right after I noticed the car hardly move and obvious drag in the engine. It starts and run but the drag when you drive is terrible and makes engine hamming hard. There was a sign at the dashboard, the lambda sign, which according to manual was 'failure in the engine electronic system'. I want to know which part in the engine needs replacement? Thank you for you help. You may reply as well at ricsan07*yahoo.com