Hope someone can help. I had my C4 on here to get a value for it in March. Had some great opinions and listed it for sale. Had alot of tire kickers but a guy sent me some cash and off the car went. He showed up with trailer, he started it and drove it ashort distance to load up. He started it two or three times getting it on the trailer then strapped it in and drove 7 hours to his place. When he got there he said it wouldnt start, it ran terrible, and its showing error codes. Is it possible that the ECM or something could have gotten shook up during transport? My car ran great but he is accusing me of selling a bad car. It bothers me because I am not that kinda person to do that. Any opinions?