Single engine dropouts and error ECM-P00BD00

Hello, I drive a 2012 XC70 with D524417 2.4l diesel engine and Heico power increase. The mileage is almost 270’000 km. For two weeks the Volvo has been showing sporadically single engine oscillations, usually at low speeds. Last week suddenly a motor error message came and the engine went into emergency run. Engine out and a few minutes waited and then I could drive again without any problems. At home I had arrived the error ECM-P00BD00 in memory. Internet search I then found the indications for defective or loose hoses and in fact also with my a hose had slipped off. I then put it up again and secured it first with a hose clamp. The hose itself had no damage. Then the error deleted and everything was good. Three days later, however, went off with the dropouts again and also the error message came back this morning. But the hose is still on. an air mass knife cleaner ordered by Liqui Moly and will then clean the LMM. Does anyone have another suggestion? Thanks and greetings, Micha