Leaking underneath Squeaky brakes Malfunction indicator light on

Hello, the "malfunction indicator light", or check engine light as it may also be known as, indicates a concern with engine performance or emissions controls. I don't suspect it's related to any leaks nor brake squeaking. It will require diagnostic testing that will be able to retrieve any stored trouble codes that have been set and then interpret and analyze to see where the concern is originating from. The leak - it's simply a matter of tracing the source of the leak. It may be helpful to lift the vehicle and inspect when there is more room to evaluate and easily see into areas better. As far as squeaky brakes - there are multiple reasons why brakes can squeak. New brake pads on brake disc rotors that have not been properly machined can cause a squeak noise. Brake pads moving in the calipers without proper shims can resonate a squeaking noise. If your vehicle has drum brakes in the rear, the shoes can squeak from the build up of brake dust or concerns with wheel cylinders. And many more possible causes. A good 4 wheel brake inspection is needed to seek the source of the noise. As far as rough riding - again, a physical inspection is needed to see if there are worn or concerning suspension components causing a poor ride. The tires can also contribute to a poor ride - are they old? Are they the proper size? There are so many possible variations here that can lead a diagnostic test for any of your concerns in different directions. Hands on testing by a professional is really what you need. Develop a relationship with a shop near you for best results: www.repairpal.com/repair-shops