Reading coil heal nevertheless flashing of the WFS

Hello I have a problem with my Transe BJ2001 2.0 Diesel I have often that I can not start the car then flashes next to the clock the immobilizer. The starter turns but it doesn’t start. 1 suspected key defective reserver key taken nix error again and again. 2 Duplicated reading coil which I have replaced but no mistakes to make again no more than 30 min wait then the car jumps again. Can it be that the ignition lock is defective? scrapes at the d I had read somewhere that the ignition lock blocked the diesel supply??? I thought that makes the WFS really stunned only when you have to get away quickly and the car doesn’t start. Had also thought about having the WFS programmed to offer some. what else could it be ? Thank you