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?
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. 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: After warm up I accelerate and it makes a rattling noise only when I'm pressing the accelerate

Hello there, thank you for asking about your 1999 Ford Mustang. You may have a defective mass airflow sensor. The sensor may not set a code either. The problem is the sensor may tell the computer you are at 10,000...

Q: Q: Transmission

For this 2004 year Mercury Mountaineer they were only equipped with a 5R55S transmission for the 4.0 and 4.6 liter motors. The only different transmissions would be for rear wheel drive or all wheel drive. They are both 5R55S base...

Q: Does the Sorento alternator fit the 2009 Kia Borrego? I know that there was another part that was replaced and it was a Sorento

Hi there, thanks for writing in. My resource states that 2007-2009 V6 Sorento will work. It has a 2 pin connector. If your Borrego that has the upgraded entertainment system, it will have a 4 pin connector and the Sorento...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
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...