Check eng light on but the shop cannot get a code. They reset the light but it came back on in couple of days.
Usually runs rough for about 5 to 10 seconds on cold start, then runs fine the rest of the time.
If I remember right, Ford retains some of the codes for their dealers.
Question: If my shop does not get a code, does that mean nothing is wrong or does it mean it something is wrong but code is not available to their diagnostic tool?
Thanks