Q: battery light and a whining noise at start up means what?

asked by on

the other day I started my car and it had a whining noise that lasted the whole trip, then yesterday when driving the red battery light came on. The whining noise is still happening also.

My car has 90400 miles.
My car has an automatic transmission.

The battery light is an indication that something in your charging system is not working properly such as a weak battery (usually noticeable with a weak start), a failing alternator or a bad voltage regulator. The whining sound may be the alternator failing which is common when this happens. I would suggest having an expert from YourMechanic come to your home to diagnose 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
  1. Home
  2. Questions
  3. battery light and a whining noise at start up means what?

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

Q: Will alternator or starter make car .it started this when i turn my ac on

If the alternator has failed, the vehicle will run until the battery dies as the alternator is responsible for maintaining the charge on the alternator. The battery light illuminating on the dashboard is usually the tell tale sign that the...

Q: Overheating, drop in oil pressure when coming to a stop

I would start by checking the thermostat. If this is not working correctly, the car will quickly overheat. Driving may temporarily keep the temperature down due to wind circulation, however once you are stopped this goes away, especially if the...

Q: Q: Loud humming noise

Hi. There are several mechanical issues that typically make a loud humming noise under the hood of most cars. One in particular that might be the source of your problem is the alternator as your friend suggested. Commonly, the humming...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...