Skip the auto shop - Our mechanics make house calls

Q: installed new alternator and battery the alternator is charging the battery and the battery is maintaining afull charge but the ba

asked by on

battery light came on ,so I assumed it was the alternator or battery, both were original so I replaced both, I checked them both and the battery is now maintaining a full charge but the battery light wont go off

My car has 101000 miles.
My car has an automatic transmission.

Hello. If the battery and the alternator are new and if it is verified that the alternator is charging then you have an issue with programming. When you replace the battery on this vehicle the computer needs to be reprogrammed to recognize it and to properly charge it. If this is not done then the computer will not turn on the alternator at the correct times an this battery light will come on. You need to have this programming done by a certified mechanic, like one from YourMechanic, who can come to you to [program the battery into the computer] https://www.yourmechanic.com/services/battery-light-is-on-inspection

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
  1. Home
  2. Questions
  3. installed new alternator and battery the alternator is charging the battery and the battery is maintaining afull charge but the ba

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: Battery weak after leaving radio on

Hello. Having a battery that has been run down, needs a jump to get the car running again, but is able to hold a charge and operates normal afterwards, may be fine; it depends on the age of the battery....

Q: Smoke coming from muffler

Hi. Consider the weather, as this can change the diagnosis. Hot steam is a product of the operation of the gasoline engine. As the vehicle is running in cold weather, the hot air may be much more noticeable. On a...

Q: Noise when key is turned on and off from under the hood

The noise sounds like the battery or connections are bad. You should have battery connections cleaned real good by disconnecting and cleaning off all corrosion and reinstalling. If problem continues then have battery tested. Once this is done then have...

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...
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...
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...