Q: High-pitched whistle from under the hood

asked by on January 29, 2016

After driving about a mile, the jeep is making a high-pitched whistle from under the hood. It makes the noise when my foot is off the gas pedal. If I am on the gas, even slightly, there is no noise at all. If I sit and idle in park for about 5 minutes, the sound slowly goes away.

Noise from engine or exhaust Inspection $79.99 - $99.99 Get a Quote

A few things come to mind when you describe this noise. Do you have a manual or automatic transmission? If you have a manual you could be describing a throw out bearing in your clutch. If you are experiencing any performance issues, it could be a restricted catalyst converter. On your model, I have even seen the PCV valve cause a noise like this. My best suggestion would be to have a mechanic, such as one from YourMechanic, come and inspect the whistle noise that is coming from your hood.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

What others are asking

Overheated, power steering went out and battery went low

Hi There, What you have described sounds like your serpentine belt may have come off. As you may know all of the accessories (ie alternator which charges the battery, power steering and the water pump) are driven by the serpentine...

Car noise at higher speeds on slightly rough roads

Hello there, many different items can begin to cause noise at this type of speed. In many cases this is not noticed as the highest speed limits in most areas is 85 MPH. The most likely cause is body noise,...

What is the best way to replace the catalytic converter?

The y pipe for the catalytic converters connects to the exhaust manifolds near the rear of the engine. There's a transmission crossmember that needs to come out and a couple of brackets, but swivel sockets help out a lot in...

Possible wheel bearing problem

Hub bearing failures are common. The description you gave is very typical of one. Bad hub bearings can sometimes vary in noise intensity when you turn left or right. This happens because more pressure is put on the bearings during...

My car's shaking and losing oil fast, what's going on

Hello, thank you for writing in. The shaking is likely caused by a misfire and engine error. You may also be dealing with multiple issues at once, or the oil leak may be causing the running issues. If the spark...

Car check engine light went off while on the highway. Halfway home I got a ref light and engine just shut off. Car no longer goes

Hi there. When the check engine light comes on, it's due to a mechanical or electrical fault that is detected by a sensor and triggered by the ECU of the car. If your check engine light is on and the...

Repeated engine stalling, even when running and driving

An intermittent problem can be one the most difficult to correct, since the problem needs to be present to best diagnose it. But there are a few things that can lend to this problem. Some possibilities are the Mass Airflow...

Engine dies when I stop.

Hi. There are a couple of things that could be wrong with your car. There could be a problem with alternator charging but not charging engough causing the battery to be weak causing the car to die after driving the...

How I replace fuel filter

The fuel filter for your car is in the fuel tank. If you want to replace it, you will need to replace the fuel pump. It isn't regularly serviceable item anymore. As for the codes, the P0172 indicates there is...

Related articles

The Most and Least Expensive Cars to Insure
Car insurance quotes depend on the car make and model. The Honda Odyssey is the least expensive and the Dodge Viper is the most expensive to insure.
Symptoms of a Bad or Failing PCV Valve Hose
Common signs include poor fuel economy, the Check Engine Light coming on, engine misfires while idling, and noise from the engine.
Understanding Jeep Oil Change Indicator Lights
Car symbols, or dashboard lights, are a car service reminder. The Jeep Oil Change Indicator lets you know when and what service your car needs.