Engine control lights on, car doesn’t pull

Hello, this morning I was on the road in my V70 D5 and on the way home my car suddenly no more herring pulled off the plate. – Call at the Volvo-Assistance and 1 1/2 h later the ADAC stood on the mat. Error memory read out, result 2 error codes, namely air mass meters and AGR valve. So LMM plugged off, engine control lights up, car pulls a little better, but not really right. LMM plugged in again, car pulls as before, but control lights bl The LMM could have a defect? I had something like that on my Scorpio a few years ago. At that time, I changed the thing and it was good. I had a problem with the LMM.