Answer:
Take out the words you should. Rewrite to say Check the air pressure in your tires.
Explanation:
Any other changes are much less obvious. Possibly, Test the lights and turn signals before you drive.
Technically, in imperative mood, the subject you is always understood, and could be eliminated. So the first two sentences could become; Take responsibility for making sure the car is safe to drive. Look at all of the following items: