AZ DOING THE SAME IN FL. NO LAWS AGAINST IT HERE EITHER. HOWEVER MY GIRLFRIEND HAS A CHECK ENGINE LIGHT ON , IN HER 96 FORD. SAYS ITS AN EGR CODE. SO I CHECKED IT OUT. DPFE IS BAD. WENT TO AZ TO GET PART , ASKED THEM TO CHECK IT OUT TOO. THEY TRIED TO SELL ME ... Login to read more.