208 emergency light

My vehicle is a 2012 model diesel vehicle. Continuous malfunction light is on. When I connect it to the computer, the p1352 engine is malfunctioning. In his description, he says a territorial fault. He says there may be a malfunction in the glow plug or roller. I got the spark plugs checked first, 2 spark plugs changed. We deleted the malfunction code and burned it again 2 days later. We looked again after the same breakdown, we changed the role. After 2 days, he again gave the same fault. We cannot find out what the problem is now. What do you think we should do?

An Ignition coil Primary circuit Malfunction / SID 801 - Pre / Post relay circuit heating - Jumper & Preheat spark plugs not checked

The 2 glow plugs have changed, the other 2 have been said to be intact.