Q: Whining sound in engine of 2009 hyundai genesis sedan.

asked by on December 12, 2017

A few months ago, I noticed a whining sound in the engine when I start the car and it gets less noisy as the car idles but then get louder with movement. It's quite annoying for an engine that's usually silent when running. What could be the problem?

My car has 234000 miles.
My car has an automatic transmission.

It sounds like you may have a failing alternator. As you may know, the alternator charges the battery while the engine runs by generating amperage and recharging the battery while the engine turns the alternator pulley. The voltage regulator is a unit that regulates the charging of the battery by the alternator and maintaining a certain amperage while the engine runs. When the alternator is not working properly, this may result in the battery quickly losing charge and the car losing all power. You may also notice a whining sound as a result of the bearings inside the alternator begin to fail. I would recommend having an expert from YourMechanic come to your location to diagnose and inspect your charging system.

Was this answer helpful?
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

Get a quote

What others are asking

1.Van shakes only when backing up. 2. While driving, van will not change gears.

Hi Arthur. Thanks for contacting us today. One thing that could cause both of these issues is a blown or leaking inner transmission seal. Since the automatic transmission works as a hydraulic unit, any leaks can cause inconsistent operation of...

Key won't turn, Check Engine light on.

If it is the correct key and it is inserted all of the way in, then most likely the cylinder is bad. Wiggle the key around while trying to turn it. It may eventually unlock and turn, but this problem...

Loose steering wheel

Hello. Thank you for writing in. The vehicle may be having one of several issues. Typically the steering wheel is not the issue when the steering becomes loose. Now if the entire steering column is loose, you can worry about...

Related articles

The Best Used Cars to Buy for Occasional Drivers
Not Not everyone relies on their car on a daily basis. Maybe you aren’t the type that deals with a daily commute, and running from here to there constantly. If that’s the case, you may be looking for a car...
The Best Used Cars to Buy If You're a Construction Worker
If If you're a construction worker, you don’t have to worry about hauling a whole lot of supplies and materials to the site – that’s the boss’s problem. As long as it’s big enough to hold your tools (and most...
A Buyer’s Guide to the 2012 Hyundai Equus
It’s It’s only fair to start this guide by equipping readers with the proper pronunciation – the luxury Hyundai with the funny name is said “ek-wuss.” With that out of the way, this sedan with the odd moniker may not...