Chirping noise

Low power steering fluid causes a loud buzzing noise that gets louder when turning the steering wheel.

Chirping is commonly caused by the serpentine drive belt. You can verify this by dribbling a little water on it when the engine is running and the noise is occurring. If the belt is causing the noise, it will change when you sprinkle water on it.

There are three things to look at with the belt. First, look at the ribbed side for cracks going across the belt. Most manufacturers say it is acceptable and normal to have up to one crack per inch. More than that and it should be replaced. Second, if a bearing is worn for any pulley, it can allow it to tip or turn and no longer be perfectly parallel to the belt. That will cause the belt to walk across it as it goes around it or the next pulley. That will set up a horrendous squeal. The third thing is most serpentine belts use a spring-loaded tension-er pulley. If those become rusted tight or weak, they will not hold enough tension on the belt, and it will squeal. That usually does not go away after driving a little while.

It is important to never use any type of belt dressing on the flat serpentine belts. Those might make the noise stop for a few miles, but dirt will stick to that and cause much worse squealing in short order. The only fix for that is to remove the belt, scrub all of the pulleys with soap and water, then install a new belt.