Q: Check system charge light

asked by on

Constantly flickering of battery light and check charging system.

My car has 140350 miles.
My car has an automatic transmission.

Hello. Thanks for writing in. The check charging system and battery light is illuminating because the battery or alternator is failing in some way, or the sensors that monitor them are failing. The battery may not be holding the charge, or the alternator may not be charging the battery enough. Either way, this is a critical system in your vehicle and it will not drive without it. There are several tests you can perform at home if you choose to. You will need a voltmeter. First test the voltage at the battery when the car is idling. Then rev the engine while in park and test the voltage at 2000RPMs. The voltage should remain between 12-14 volts. Any lower and the alternator is not sending the battery enough power. Any more, and the alternator is working too hard. Either way it is likely the alternator or battery will need to be replaced. Until further testing is done, we cant tell.

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
  1. Home
  2. Questions
  3. Check system charge light

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: P0171 and P0442 in a 2003 VW Jetta 1.8T. We bought it used 144k miles. Light came on before changing the air filter. Any solutions

Hi there. The two codes you've listed might indicate different problems than you've been told are the root source. The P0171 code means that, on the first bank of the engine, the fuel system is running weak or a vacuum...

Q: Vehicle scan showed problem with emissions air pump. My air smog pump was filled with liquid

The air pump sucks in outside air in the lower front fender area and the car may have sucked in water while the pump was running. The only way to stop water from entering the air pump is to not...

Q: Battery Light illuminated

The Battery Light on the dashboard typically indicates an issue concerning the vehicle's charging system. This usually points to an alternator that cannot maintain the charge of the battery. The alternator is on a fused circuit, and fuses should be...

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...
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...
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.