Skip the auto shop - Our mechanics make house calls

Q: CEL bad bearings alternator

asked by on

My check engine light is on and a mechanic told me the bearings were bad in my alternator is causing the engine to run allot louder then it should. Do you know what the problem is? How can it be fixed?

Hi there. Thanks for writing in about your 2008 Mercedes Benz C350. If the alternator is failing and not supplying the right voltage to the system, then this can cause the Check Engine Light to come on. If the bearings are failing then the alternator will make a lot of noise. If this is the case, then the alternator needs to be replaced. If you want someone to give this a second look, consider YourMechanic, as a certified mechanic can come to your home or office to inspect the louder-than-normal noise and replace the alternator if needed.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
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. CEL bad bearings alternator

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: Vibration from passenger side front wheel.

Occasionally, you will be able to measure enough play in the bearing that you can condemn it without further testing. You have to check the factory spec. to see what is allowed and will have to use a dial indicator....

Q: My 2002 Honda Odyssey has a Check Engine light. It's supposed to be a misfire. The mechanic adjusted valves and changed coils but the issue remains

Hello. What problem code is stored for the Check Engine light? Hopefully all the plugs and all the coils were changed. If there was oil leaking (from the valve cover gasket) onto the plugs or rubber coil boots, this can...

Q: I've gone through 3 batteries in the last year

There is a lot of poor quality batteries on the market now that have only 12 or 24 month warranties on them. These batteries may last a year or two if you are lucky. If you continue having problems with...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...