My speedometer just quit working. The milage and trip indicator still works. on 2007 Chrysler Town & Country

It has one code: P0455 generic Evaporative Emission System Leak Detected gross leak/no flow . The van runs fine otherwise.

Asked by for the 2007 Chrysler Town & Country
the evap code needs to be diag by a shop with a smoke machine and test equip for evap. sys. possible speed sensor or cluster issue on no speedometer
Thanks for your answer. I'll get it checked out.