I have a 2006 Kia Rio LX auto. 1.6, sometimes when running the 4th gear does not work, so I can only go about 45-55 on third gear with the rev at 3.5.
If I stop and turn off the car for about 1-2 min. it works?? any thoughts
thanks
On my 2007 Rio LX Auto, there is an Overdrive On/off Button on the shifter stick that disables the 4th gear when pressed. It is a little black button just below the main Shifter Button you press when moving into gear. When the button is pressed a small indicator appears on the dash that says "O/D off" or something like that.
Perhaps that little button is getting pressed accidentally when moving the shifter or the button is malfunctioning. You should try checking to see if that button is functioning appropriately.