key won't come out

Have a 2001 Rodeo and can't get the key from ignition without phsically pulling out the shift button that seems to be sticking. Sometimes it won't get out of park without pulling out shift release knob. Had a problem with it a while back where i had to jiggle the shifter a little bit to get the key to come out. Is it a cable problem or some kind of a switch problem. Seems if it where a switch I wouldn't be able to get the key out by pulling the relase knob all the way out after it sticks.