After I don’t get any further through the search function and Google I have to open a new topic. I have the error in it as it stands above. My friendly Volvo workshop can’t tell me what it is and so I have already fixed a few possible causes on my own. Have throttle valve remodeled, coolant sensor replaced, vacuum hoses renewed (although these were tight), both lamda probes replaced, new candles in it and air filters of course also changed. oblem once makes itself noticeable by the MKL, partly the motor jerks when accelerating and from 4000 revolutions not much happens anymore. A sawing in the idle is not available although it sucks off from time to time with the speed, when you drive to the traffic light and take the gear out. The only thing I have still thought about is: air mass meters (although ETS would have to light up), intake air temperature sensor, charging pressure sensor and charging pressure control valve. hliegen or how can one check these? Thanks already for all tips and hints