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
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2000 Ford E-150 Question: no diagnostic codes readable from scan tool--bad miss and service engine light
Answer #1milesauto from Miles Auto Service Inc., August 08, 2012, 04:53Master
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 #2Greg's Orange Auto (11856 Answers) , Orange, CA - (714) 361-9386globalhelper August 08, 2012, 06:55Master
you need a good scan tool to retrive codes at times the cheaper ones are not able to. seek a diag