If your Nissan Sentra’s battery light is on, it means a couple of things. It is trying to warn you that there is an worry through the charging device. The charging system itself is relatively simple. It’s almost always going to be caused by a negative battery or alternator.

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The battery light comes on once it detects that the voltage in the battery is as well low. Many battery lights will come on once the automobile starts if the computer system has detected that the voltage was too low for a quality start. With an older battery, you will regularly notice this on the first truly cold day of the year.

You may have actually noticed your Sentra struggling to start, and then the battery light remains on after the start. That would certainly indicate a negative battery, yet it’s still worth your while to have it tested first.


Nissan Sentra Battery Light Causes

The charging mechanism in vehicles hasn’t readjusted that much in the last 50 years. The engine transforms the alternator, which charges the battery. Tbelow isn’t a lot to it, which provides diagnosing it fairly simple.

1. Battery

The battery is generally tright here to start your Sentra. It can run off the alternator simply fine as soon as it’s began. This is an essential point to recognize. A poor battery commonly makes itself recognized once you are trying to begin the vehicle.

2. Alternator

A typical alternator

A poor alternator will normally make itself well-known as soon as the engine is currently running. If you see your Sentra’s battery light turns on while the engine is currently running, that is a strong indication that the alternator is no much longer offering sufficient wattage to power the various electric systems and also charge the battery at the exact same time. A new alternator will rectify the difficulty.

See Also: Nissan Sentra Bad Alternator Diagnosis

3. Alternator Belt

Nbeforehand all modern vehicles usage a serpentine belt to turn the alternator. The serpentine belt transforms even more than one engine accessory (A/C compressor, power steering, etc). If the serpentine belt goes negative, it will certainly no longer be able to revolve your Sentra’s alternator enough for it to obtain an sufficient charge.

4. Battery Post Corrosion

The voltage from the alternator is sent out to the battery via a wire that connects to the battery article. If the battery write-up is really corroded, it won’t be able to perform its job of sending the voltage to and also from the battery efficiently, and also your Sentra’s battery light will turn on.

It just takes a 2nd to inspect it out. A battery article cleaner or wire brush can clean it up in no time. Just be cautious not to acquire any of the corrosion in your eye.

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Battery Light Diagnosis: Nissan Sentra

You deserve to diagnose whether your Sentra’s alternator is poor pretty quick at home. If you have a voltage meter, that’s a fantastic place to start.

Voltage Test

The initially point that you’ll desire to perform is gain an excellent multimeter. With a multimeter you execute a quick test to check out if your Sentra’s alternator is functioning or not.

The adhering to was taken from poor alternator diagnosis web page on this site:

Set the multimeter to read voltage. Specifically, you’ll must set it to 20V DC. With your Sentra turned off, you’ll connect the negative side of the meter to the negative battery post or wire. Touch the positive side of the voltmeter to the positive battery wire. With the engine off, you need to get a reading somewhere in between 12.0 volts and 12.6 volts. Now that you have a baseline, it’s time to turn the engine on. Leave the air conditioner off, as well as the headlights and any type of other accessories. After firing the engine up, you need to get over 14.2 volts. If you got 14.2 or even more volts, the alternator is charging fine. If it’s still reflecting in the 12’s, it’s time to relocation the alternator. If it’s creating a voltage level in the 13’s, go ahead and take it right into a parts store and also have actually it tested. It’s more than likely negative. Now, assuming that the alternator was producing over 14 volts, go ahead and rotate on the headlights, air conditioner, radio, and any other accessory you can think of, and run the same test all over aobtain. If the voltage dropped ago into the 12’s, it’s a very solid indication that your Sentra’s alternator is negative. It’s still worth having actually it tested, yet be all set to replace it.

Battery Test

If the alternator appeared to be charging the battery fine, then it is time to move on to the battery itself. We recommfinish taking it to the neighborhood components keep. Almany every one of them will certainly test it for free. If it’s negative, they’ll also install the new one.

Conclusion: Nissan Sentra Battery Light

Your Sentra will certainly operate for a brief period of time off of the battery alone. But, if the alternator has actually gone bad, it will eventually leave you stranded. If your battery light comes on when you are on the road, obtain somewbelow to have it tested as quickly as you deserve to. If you feel tright here is anypoint you have the right to include, please leave a comment listed below. Good luck!