Please Help!!! Speedo at 100mph while going 40 mph in GPS (w/video)

[alexander1985]

Hi everyone i hade a problem with my Explorer 2002 XLS 4x4, the speedo is showing 100mph while in reality going 40 mph in GPS, then if i go faster than that, the begins to bounce the revs. Please any suggestion for this problem. there is a video attached. Thanks a lot!

 

[JK080]

Scan the vehicle and figure out what the ABS and CEL codes are telling you and why is the battery light on while the engine running? Check the transfer case for codes too and look at its datastream for clues.