Q: My car says check charging system. Whats wrong?

asked by on

it will start but the check charging system light comes on u drive for a little bit an it dies you can start it back up sometime but once the battery dies you have to restart an charge the battery again

My car has 151000 miles.
My car has an automatic transmission.

This may be a sign of a weak battery, 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.

When the voltage regulator is not working properly, this may result in the alternator allowing too much power to be delivered to the battery resulting in damaging wires and prematurely sometimes destroying the battery. A common sign of this is usually the acid inside the battery boiling causing the battery to swell. In other cases it may result in the alternator not supplying enough power to the battery, resulting in undercharging the battery or not charging it at all. I would recommend having an expert from YourMechanic come to your location to diagnose your vehicle’s charging system.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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. My car says check charging system. Whats wrong?

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: Car gauges

As long as the gauge cluster issue is the only issue you are having, the vehicle should still be safe to drive. As far as what exactly is causing this issue, it is possible that the computer module responsible for...

Q: Sunroof not closing

The sunroof on this car may have a bad limit switch that detects something in the way of the window; this is a safety feature that will keep the window from closing. I recommend that you have a mechanic, such...

Q: When the car reaches 54km, 76km, or 101km. to 108 km - there is a steady drone noise. Above or below numbers given it goes away

Hello. This may be related to many different things. One of the most common droning noise sounds, however, is the sound of worn wheel bearings that need to be replaced. This sound will be produced at higher speeds as you...

Related articles

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...
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...
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...