fuel pressure error

Hello friends, I have a 2005 model 307 sw vehicle and there is no place I have not taken for 1 year, but no one has drawn the problem, unfortunately my vehicle gives a fuel pressure error, they said it is chronic, they said that it is chronic while the vehicle is driving, when I compress the vehicle a little, the vehicle cuts off the gas and the rev counter does not exceed 2000 rpm, but while driving, I turn the ignition off and on. and it gets better for a while, I ask my friends who had this problem before and had it done, to give information. Good evening

If the vehicle is diesel or gasoline or diesel, the rail ramp switch also passes, have it checked