Hello I bought a Honda fit and I went to do a subwoofer and after I left the shop the car won’t turn off completely the engine turn off but Eve thing else stay on like the radio and dashboard and when I turn off it beep and I can’t lock the car with my key remote and p comes up in the dashboard I went to 5 different electrical no one knows why it’s doing like this so I don’t know what to do any help please or suggestions