Originally Posted by
2004F250superduty4X4
According to the website it is a compatible scanner for this pickup. And yes I do have the key on. It doesn't seem to work with the engine running either.
It will not link properly with the engine running. Try a DTC reader from a local parts store to see if it is the fault of the scanner or truck. This will eliminate whether the scanner you purchased is a bum tool or not.