» » »

Ford Q&A

Ask Your Question

2005 Ford Mustang Question: erratic guages/failed smog

 

Question

Visitor, Henderson, NV, July 09, 2010, 16:46

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?

Thank you!

Edit Your Reply

1 Answer
Flag This
  • Answer #1

    October 25, 2010, 14:00
    Profile_thumbnail
     Technician

    This is pretty common on the 2005 Mustangs, it's caused by failing stepper motors in the instrument cluster, they control the movement of the gauges. There's a guide on how to fix them here - www.2005-mustang-speedometer-problem.com

    Reply
    Flag This