RepairPal Certified shops can diagnose and repair your 2006 Ford Taurus. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
Professional SCAN TEST will make short work of a positive repair solution!
Why guess at it?
During short test drive - scanner mph display can be compared to speedometer reading for positive identification of problem area..
Only way to go.
IF scanner display is reading same as speedometer = mph *signal* malfunction. IF scanner display is actually reading mph = *speedometer* malfunction.