usually if the problem is fixed the light should go out but if you want to clear the code that caused the light to come on then you have to reset your van's computer. do this by removing the negative battery cable from the battery for about 1 minute then touch it to the positive battery terminal and then rehook up the negative battery cable to its terminal. if the light comes back on when your driving, then your problem is not fixed and something else is wrong. OR You can have an autoshop or autoparts store use a scan tool to clear the code/turn off the light