Why does my battery light not go away after replacing alternator and battery?

Highly likely that the new alternator is faulty. This happens sometimes if the voltage regulator fails. The other thing to check is if the alternator drive belt has been tensioned. If it is not spinning the alternator the light will be on.

How long does it take for battery light to reset?

The message can reset by itself, but the car needs to sit undisturbed for at least eight hours. Perhaps with your work/driving schedule the car doesn’t sit long enough.

Why is my battery light still on after I put a new battery in?

The battery warning light in most cars indicates there is problem with the charging system as a whole, not just the battery. The light should go out when the problem is repaired. It may not go out immediately though. You need to have your alternator checked.

Why is my battery light not going off?

You’ve checked for and cleaned off any corrosion, and you’ve tightened up any loose battery cables. But your battery light is still on?! The culprit could be a mechanical issue, like a problem with the alternator or voltage regulator. Or, it could be something systematic, like faulty wiring.

Why does my alternator light stay on?

When the light stays on, it indicates that the computer has detected an issue with the charging system. An alternator that is on its way out may cause this warning light to flash when there is a high demand on the battery.

What could cause the battery light to come on?

An illuminated battery light could be due to a number of issues, including: A loose or corroded battery cable. A problem with the alternator or voltage regulator. Damaged cells or plates inside the battery.

Can a sensor cause battery light to come on?

If the battery temperature sensor fails, it can also cause the Battery Light to become illuminated. The Battery Light may also be illuminated if the sensor detects that it is too hot, to alert the driver to shut off the vehicle before damage occurs to the battery.