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: One month ago cel came on I changed spark plugs to after market plugs. One month later cel on again with misfire code.

If the spark plugs hadn't been changed until 130k, it was time for the to be replaced anyway. This is probably why the dealer went with that repair as worn spark plugs can cause misfires. Ignition coils are another part...

Q: I have a Mercedes 280 SL, 1985, WDB1070421A020760, many times it just stop while driving or at a stop. I have changed the fuel pump

Wow! A 280 SL with a manual gearbox is a rare machine indeed! It looks like you've eliminated a few of the prime suspects. The fuel pump relay would have been my first guess. But it looks like you've already...

Q: Multiple Issues

Hi There, It sounds like you may have a fuel pressure problem that may be causing the motor to starve for fuel, which would help explain the backfiring and the need to feather the throttle in order to keep the...

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...
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 P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.