* The parking light switch is turned on. This is the most common reason why the parking lights would stay on. Make sure that the parking light switch is turned off when you don't want the parking lights to be on.
* The parking light relay is stuck. The parking light relay is a small electrical switch that controls the flow of electricity to the parking lights. If the relay is stuck in the "on" position, the parking lights will stay on even when the parking light switch is turned off.
* There is a short in the wiring. A short in the wiring could also cause the parking lights to stay on. This is a more serious problem that will need to be repaired by a qualified mechanic.
If you're not sure what is causing the parking lights to stay on, it's best to take your car to a qualified mechanic for diagnosis and repair.