Q: Charging system warning light.

asked by on November 28, 2016

I have a 2011 chevy cruze LS and I've been have a battery charging system warning light come on and when it comes on the battery light come on on the dash bord and like a fue minutos later it says battery saver active and when i check the volt it on 11.8 what could be the problem this happens when im driving i don't think that is the battery because i got a new one on it what could be the problem???

My car has 81235 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?
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

What is the average cost for a valve and piston rod replacement job. I thought it was the lifter but now they say its valve.

The cost depends on the amount of damage and is quite literally impossible to even guess at without physically removing the parts and determing exactly what parts have to be replaced. It is not just a simple matter of taking...

Temperature gauge erratic/ rpm erratic

Most likely this is a problem with the instrument cluster. Even so, I would make sure your vehicle isn't actually overheating. The best method for doing this is with the use of a infrared temperature gun. They aren't cheap, but...

Where is the fuel pressure regulator located at

The regulator is below the upper intake manifold assembly. There are quite a few steps involved and exceptional care has to be taken during replacement to ensure that there are no leaks on re-assembly. If the car has over 150,000...

Related articles

2012 Chevrolet Cruze vs. 2012 Hyundai Elantra: Which One Should I Buy?
When you’re looking for a four-door sedan, you’re likely interested in a smaller family car that still offers decent styling and looks, great gas mileage, and a comfortable interior that will keep your family safe as you’re driving. While not...
How to Buy a Classic Chevy
For experienced car collectors and rookies alike, owning a classic Chevy is a rite of passage. There are multiple decades and styles in which Chevrolet made popular cars. Many of these cars then had a devout following in the years...
How the Alternator Works in Your Car
Your Your car alternator, at its most basic, is what works along with your battery and the rest of your charging system to keep your car running. When you start your car, you’re running on battery power. Then the battery...