Q: Q: Loud humming noise

asked by on

The battery light icon and check charging system came up, and it's making a loud humming noise. I believe the alternator needs replacing.

The bearing or brushes in your alternator are likely going out. You could also have another issue in your belt drive system causing the noise and lack of charging.

A visual inspection of the drive system, a stethoscope to listen for noise, and a multimeter to test your battery can determine the cause of your car’s issues. I recommend having a certified mechanic, such as one from YourMechanic, diagnose your car’s humming noise and Battery Light to recommend the best path to repair.

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. Q: Loud humming noise

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: Disappointed with the auto sliding door

It is not recommended to operate the automatic sliding doors manually for a long period of time, but as long as the mechanical aspect of the sliding doors are working, you can use it manually. If you have reached a...

Q: steering column shaft is hitting the wall to the left and right when turning.

Hi there. Check the locking pin to the steering column shaft and make sure that it is locking to the input shaft to the rack and pinion gear set. If the lock is engaged and the shaft is coming off...

Q: Q: My car keeps shutting off

Hi there. From the description you have given, the charging system needs to be inspected. First, the battery needs to be charged and load-tested. Assuming the battery tests good. The battery terminals are clean and tight. From what you described,...

Related articles

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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.