my 2005 kia will not shift into passing gear

This vehicle has an electronically controlled transmission, including for forced downshifts. Therefore, analysis needs to be done using diagnostic equipment that can monitor signaled commands and the results of those commands to determine what is malfunctioning. Seek a local shop that has the equipment and technical know-how to help. https://repairpal.com/kia-within-10-miles-of-eden-prairie-minnesota-55344