A while back my Quest van stopped going in park.  I found a small screw on the floor under the gear shift ( gear shift is on the column ).  The car goes in all other gears fine, but the orange indicator on the dash for the gears selection goes past the proper gear.  For example, if i'm in drive, there is some play in the indicator from N to D2 before it actually engages another gear.  I can get the key out and start it from neutral.  I just set the emergency brake when I turn off the car.  Any ideas what it could be would be appreciated.  TIA.