1.9 dCi 75 kW: On incline suddenly on control lamp (rectangle with sawtooth, including heating spiral

Hello municipality. I got myself a Scenic l, phase ll, Bj 2000 a few days ago. He is motorized with a 1.9 deci, 75 Kw and now has around 230,000 on the clock. At the time of the inspection I could not notice any big defects. He jumped immediately, ran calmly and was dry as a whole. Daa problem then occurred during the transfer: every time a slope came up suddenly a control lamp went on (rechteck with sawtooth, among them heating spiral) and the car was only running up to just over 2000 tours and was doing dicle baking at 100 km/h. On a flater road the whole thing happened again. What can be Yer Fwhlwr? Other places I got gwleaen, the lamp would be for the engine electrics and someone who had the same problem wrote, it came after the win Turbo was changed and the new loader built up too much pressure at Vollast. Did anyone ever have this phenomenon here? Can it be the turbo or something else? I am for every one of them. E help grateful. MfG, Jörg.