Skip the auto shop - Our mechanics make house calls

Q: my battery light came on i replaced the battery my car did good but now its shutting off and the battery light is back on

asked by on

What do i need to check

My car has 213000 miles.
My car has an automatic transmission.

It sounds like you may have a failing voltage regulator or failing alternator. As you may know, the alternator is responsible for charging the battery while the engine runs by generating amperage and recharging the battery while the engine turns the alternator. The voltage regulator is a unit that regulates the charging of the battery by the alternator and maintaining a certain amperage while the engine runs. When the alternator is not working properly, this may result in the battery quickly losing charge and the car losing all power. You may also notice a whining sound as a result of the bearings inside the alternator begin to fail. I would recommend having an expert from YourMechanic come to your location to diagnose and inspect your 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!
  • Home
  • Questions
  • my battery light came on i replaced the battery my car did good but now its shutting off and the battery light is back on

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: How should you tow in an emergency?

While it’s hoped that this will never happen to you, there’s always the chance that you’ll break down while you’re out and about. If this happens, you may need to have your vehicle towed. Make sure it’s towed following these...

Q: Oil spark plug issue 1989 Honda Civic

Hi there - to be sure, oil leaking down onto the plugs from a bad valve cover gasket will cause misfire and hard start/no start problems. It is also possible you have a failing ignition module or coil that has...

Q: Check Oil Light coming on.

Hello. You are correct that the light can come on for these reasons. If the oil light comes on and there is no engine noise then it is more than likely the oil pressure sensor that needs to be replaced....

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...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...