Skip the auto shop - Our mechanics make house calls

Q: Charging system warning light.

asked by on

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.

A: This may be a sign of a weak battery, a fai...

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 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!

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: AC is not blowing cold and a plastic-like smell when AC is on.

There are different possibilities that could contribute to the plastic smell. The smell could be caused by a coolant leak, an electrical issue, the A/C compressor overheating, or simply an outside smell. Sometimes, plastic bags tend to get stuck...

Q: No crank no start

No crank conditions are inherently caused by bad connections. The question to ask is where that bad connection is. As simple as this sounds, identifying a bad connection isn't a factor of what a physical connection looks like. You can...

Q: What does the car do when anti theft is activated? does it have no compression kind of like head gasket?

The head gasket and/or other mechanical components of the engine are NOT involved in this fault you are experiencing, at all. Cavaliers have quite a few electrical and instrument panel problems. If you search the NHTSA database for complaints from...

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...
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...
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...