Trying to figure out why I am still getting this code? Everything was fine on a trip from NC to TX. As soon as I crossed TX state line, I started getting the code. Anyhow, before this all started I had to extend the O2 sensor wires due to a body and suspension lift. I have replaced both TPS and o2 sensor. I have checked the wire for damage. Seems to be ok. So, is that single wire just a ground wire? If so, and I can't see any visible damage to it, can it not just be grounded to the frame or something? Any help would be appreciated. Quick note: The check engine light only comes on over 60 MPH. When I trouble shoot diagnostic codes, I only ever get a 13... Can a faulty EGR set this code off as well? I was getting EGR codes for a while, but then they just stopped coming up.