I have an issue as my 2005 mustang. It failed smog today with the PO4063 error. I have had a check engine light on for a couple of months, the fuel guage and the speedometer guage are both erratic and not accurate. I am taking it in to a mechanic as I need my car, but am really concerned about getting screwed as I have never failed an emissions test and do not know much about them.
Any ideas what could be wrong or what is required to correct?
Edit Your Reply