no diagnostic codes readable from scan tool--bad miss and service engine light on 2000 Ford E-150

Two different car parts places scanned my van and received no codes from my system--they thought loose wires under dash (I don't believe it) or a blown fuse for the diagnostic system--I don't know what fuse that would be or how it would be listed

by in Loveland, OH on August 07, 2012
2 answers
ANSWER by on August 08, 2012
A short circuit to any number of sensors can cause problems with data communication line that the scan tool commicates though and simply a bad PCM can cause this. Need to take to good technician to diagnose...parts stores are not going to be able to figure this out for you.
ANSWER by on August 08, 2012
you need a good scan tool to retrive codes at times the cheaper ones are not able to. seek a diag