Famous Check Engine Light On Hyundai Sonata 2011 References. Web common causes for hyundai check engine light. The cause of the check engine warning light illuminating was not found.

Engine misfires, faulty oxygen sensors, and other problems can trigger the warning light, indicating the need for repairs. Average failure mileage is 69,200 miles. Since then, we took the car to the dealership (the first time) and they said it might be the gas cap.
