Skip the auto shop - Our mechanics make house calls

Q: Changed alternator and battery, but still says check charging system

asked by on

Changed my battery a few weeks ago when my car died. Check charging system came back up. AutoZone said it was the alternator. I changed that also. Now two weeks later the message is back. What is it?

My car has 61000 miles.
My car has a manual transmission.

Hello and thank you for writing in!

This is likely a sign of a bad voltage regulator. This is a unit that regulates the charging of the battery from the alternator. When this is not functioning properly, this can cause the battery to be over or undercharged by the alternator and will cause this light to come on. I would recommend having an expert from YourMechanic come to your home to diagnose and service your car’s charging system.

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

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Changed alternator and battery, but still says check charging system

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: Fuel pressure

Hi There, It sounds like you may need to check the carburetor for adjustments. I would start with checking the float, accelerator pump, the pump cam, squirter and secondary opening rate to be sure this is all in sync. Generally,...

Q: Throttle custs out for a split second then resumes.like nothin happend

You should have the vehicle computer scanned to see if there are any codes stored that may cause this problem. If there is no codes then have the computer data monitored and recorded when the problem happens to see if...

Q: Alternator is dead!

This may be related to a failing alternator or voltage regulator. It is not at all uncommon for an alternator to fail. As you may know, the alternator is responsible for charging the battery while the engine runs by generating...

Related articles

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...
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...
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...