First of all, thanks to everyone for the answers. The car is a 2010 model 206 1.4 HDI. A few days ago, I had the car grounded while trying to replace the fan relay. The car was running at the time, but it stalled. Now it starts but doesn't work. I checked the fuses, reset the ECU, and tried with a spare key thinking it might be related to the immobilizer, but I couldn't find a solution. I'm afraid there's a problem with the ECU or the wiring. Thanks in advance to anyone who has encountered this problem before or can help.