What should I do when my check engine light comes on? If your check engine light comes on, and your car is running fine, check all of your fluids to make sure they are full, then give us a call, so that we can get you in sometime within a week or so. If your check engine light comes on and your vehicle is running rough, having a hard time going up hills, is sputtering, etc, give us a call so that we can get you in as soon as possible. You don’t want to continue to drive it for a long period of time, as in doing so you could cause more damage. If your check engine light comes on and it is blinking, pull over and turn your vehicle off. Call AAA or a tow truck and get it towed in. Do not continue to drive with a blinking Check Engine Light!! Your check engine light coming on can be as simple as a loose gas cap, or if it is blinking, it can me major engine/transmission issues. Never ignore it, but understand the different levels of concern.