Ok, so Hi everyone, I'm new to this forum yet I am trying to solve a problem on my beloved S80. Main problem: no power on starting drive from 0. Sorry for bad english: usually car goes quite decently, all basic things changed (oil, air filters) and brand new yet the motor 2,4l diesel should go much faster from stop, and the acceleration is very slow and delayed. In my opinion the problem might be in air flow tubes so I wonder if anyone have any schematics on airflow so I could recheck the tubes myself. Also check engine shows faulty with "motor ovehound" or smth even though no problems in motor itself. Could be a problem associated in airflow?

 

Did it happen right after "all basic things changed"?

Before you get a schematic and drive yourself crazy tracing things, simply look at ever hose and see if one end is disconnected.