If it is a loan office or bank, they can take the vehicle and sell it again and if it does not sell for the amount you owe they can sue you and make you pay the difference. That in the law in most states, you need to check the law where you are from but I am almost sure the law is about the same everywhere.
I have a van but I'm not the lien holder of the vehicle what can I do I still have 34 months to pay
A lien may be waived once the debt is either fully paid or on arrangement between both parties. When tax liens go unpaid, the tax lien holder may demand immediate payment, or may take possession of the property in accord with the local lien laws. Liens can also be sold at an auction for the price of the tax lien, regardless of the property's value, and to a third-party investor.