Most likely DPF or EGR that needs cleaning. If it the engine light that just lights, not blink..
If the engine light is on, Im not sure if it will clean out so well the DPF, as far as I understand the car is in protection mode.
Read codes from OBD2 reader, then your more sure. Its very common with DPF and ERG issues with these cars. I use also DPF cleaner in fuel now, have "same" car just as Combo.. And make sure to rev up regular to clean out DPF