Skip the auto shop - Our mechanics make house calls

Q: Battery Light on

asked by on

The Battery Light is on.

Hello! The Battery Light indicates that there is a failure in the charging system. This should be diagnosed and repaired sooner than later, as a failing charging system can leave you stranded. The charging system needs to be tested to see if the alternator, or voltage regulator, has failed. Sometimes, the voltage regulator can be replaced separately, which helps in reducing the cost of the repairs. On some newer cars, the voltage regulator is controlled by another control unit, and the car must also be checked for codes. You will need the aid of a mechanic who can scan for the code, and test the charging system to properly diagnose your Battery Light illumination issue.

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

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: While driving it stated making a loud noise. Then it started to jerk, it began to brake itself and wouldn't move.

This may be a sign of low transmission fluid or a faulty transmission control solenoid. As you know, automatic transmissions use pressurized hydraulic fluid to change gears. Every time a gear change is required, the car's computer activates a transmission...

Q: Overheating

The radiator should be full upon opening the cap when the engine is cold. If after filling the radiator, in subsequent days you find that the coolant level has dropped, that means that there is a leak in the system....

Q: my battery light is on when the car was started, in the morning whiles going to work it was normal, it was till I closed from work

Hey there. I would test your alternator. Use a multi meter to ensure your alternator is reading 13.8-14.2 volts while the vehicle is running. If it is not, try replacing the alternator and see if it removes the battery light....

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...
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...
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...