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?

A: Hi there. Thanks for writing in about your ...

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

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: I have a creaking/squeaking noise when turning the steering wheel

If an assistant, preferably a mechanic, listens at the relevant suspension and steering components under the vehicle as you turn the steering wheel the sound can undoubtedly be pinpointed. Be sure to check at the top of the spring tower...

Q: I don't have any clue what happened!!!

Hello. The squeaky drive belt was the cause of the problem. It has likely failed. The water pump, which is driven by the drive belt, is responsible for the flow of coolant through the cooling system and the heater core....

Q: Alternator

The two alternators are not compatible. They come from two different years and size motors are different. The Old Alero is a 2.4l and Pont Sunfire is 2.2 motor. The wiring is different for the two alternators.

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...