Q: Battery Light is on

asked by on

My battery light stays on after starting of vehicle but goes off when I accelerate

My car has 77000 miles.
My car has an automatic transmission.

This may suggest a few different possible failures, such as a weak battery, a weak or failing alternator, or potentially a bad voltage regulator. When the charging system detects a weaker than normal amperage in the system, this may cause the Battery Light to come on. As you accelerate and the RPM’s increase, the alternator begins to charge the battery at a more rapid pace due to the fact that the alternator is driven by the engine speed. I would recommend having an expert, such as one from YourMechanic, come to your location to determine why the Battery Light is on and suggest any necessary repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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
  1. Home
  2. Questions
  3. Battery Light is on

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: Hatchback keeps closing on its own.

Hello, the liftgate not staying open is a common concern on all vehicles with a liftgate or hatchback. The liftgate is held open by two gas charged struts, one on each side. The struts lose pressure over time and become...

Q: Speed dropping suddenly while driving

If this issue is occurring while you've engaged the cruise control, then this may be caused by a bad or failing cruise control brake switch or transmission speed sensor. If this issue is happening with the cruise control not active,...

Q: Car not starting after battery install

Hi. It seems like you may be having trouble with the power output and connections from your battery to your vehicle. It is possible that the battery was not charged from the store you bought the battery from. It could...

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...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...