There are a few things you can do to get cat pee out of your car. One is to pour a pot of boiling water onto the area where the cat urinated and wait for it to cool. Another is to use a plunger to suction onto the cat’s urine and pull until the urine comes out. Finally, you can use a vacuum cleaner with the hose attachment to suck up the urine and put it in a cup or container.