Hyundai Elantra Alarm Keeps Going Off

So, your Hyundai Elantra alarm keeps going off… And for no reason.

This is a concerning issue that nobody wants to get themselves in. After all, it is a nerve-wracking problem that can make you wonder if it is a major problem to get fixed or not.

The obnoxious sound can be annoying and distracting not just to yourself but to others, as well. This is why you would want to get it fixed – and fast.

Ever wondered why a Hyundai car alarm keeps going off for no reason, anyway? What can you do about it? We’ll address these questions – and more – in this insightful post, so stick around!

Hyundai Elantra Alarm Keeps Going Off

Why does your Hyundai Elantra alarm keep going off?

Here are some of the reasons why this happens:

1. Damage to the keyfob.

This is one of the most common culprits behind this constant alarm going off. You use your keyfob to lock or unlock your door, as well as to start your engine remotely (in some cases).

However, it tends to malfunction because of some shorting out issues. As a result, your alarm just goes off even without any other triggers.

2. Battery has gone low.

If your vehicle’s battery is running quite low, then it is possible for the alarm to go off. This is merely a way to alert you that you need to change or charge your battery. It is not an accidental thing, then, when your alarm goes off. Which is why you should consider checking the battery to make sure it is still charged.

3. Corrosion in the battery.

Another possible reason why your Hyundai Elantra alarm keeps going off is an issue with the battery. There may be corrosion that is causing the signals to get triggered, which causes the alarm. An electrical system in your vehicle malfunctions, and this includes your car alarm.

4. Alarm installed incorrectly.

This one is a no-brainer. Naturally, if your car alarm is poorly installed, then it will not function well. It will simply go off or not sound at all. The wiring should be checked to make sure that everything is right about it.

5. Shock sensors are too sensitive.

Your car alarm is triggered by your shock sensors or vibration sensors.When someone is trying to pry your car door open, or an object accidentally bumps on your car, then the alarm immediately goes off. This is why you can simply conduct a test to check if these are the reasons why your alarm is activated. If this is the case, you will want to recalibrate the alarm to minimize sensitivity.

6. Hood latch sensors are activated.

Next up is the hood latch sensor. Your car manufacturer has designed your alarm in such a way that it is activated when someone lifts the hood intentionally. Thus, this prevents intruders from stealing your battery or the vehicle itself. If your alarm goes off, perhaps someone is trying to work their way to opening the hood latch.

What To Do When Your Hyundai Elantra Alarm Keeps Going Off

what to do when your hyundai elantra alarm keeps going off

Now that you know the reasons why your car alarm keeps going off, let’s talk about solutions. What can you do to prevent or fix this issue?

Here are some suggestions.

1. Replace your keyfob batteries.

If you have discovered that the alarm is activated because of a poor battery, then you will have to replace them. This is the simplest fix you can possibly do.

In most cases, the battery is just like what you use for your watch. Hence, it should be relatively easy to find. Swap the old batteries out and check if this resolves the problem. Fortunately, it should be quite cheap to buy this type of battery, which could only cost you less than $5.

And the best news? The battery should last for 2 years or so!

2. Check your car battery.

If the problem is not because of your keyfob but your car battery, then you may need to get it replaced.

First, check the battery charge by using a voltmeter. This should help you determine if it needs a replacement or about to die. Basically, if the voltage is at 12.6 or under, then you may have to buy a new battery.

Now, this can be a bit expensive, depending on the type of battery you are getting. On a low end, it can be $240 while a more expensive one is at $350 or so.

Car Battery Replacement Estimate for Hyundai Elantra

Hyundai Elantra Car Battery Replacement costs $290 on average

Car Service Estimate Shop/Dealer Price
2011 Hyundai Elantra L4-1.8L Car Battery Replacement $508.61 $623.17 – $938.93
2016 Hyundai Elantra L4-1.8L Car Battery Replacement $488.61 $603.18 – $918.96
1993 Hyundai Elantra L4-1.8L Car Battery Replacement $432.33 $532.83 – $806.40
2003 Hyundai Elantra L4-2.0L Car Battery Replacement $432.33 $532.81 – $806.36
2016 Hyundai Elantra L4-2.0L Car Battery Replacement $536.07 $662.52 – $1013.91
2019 Hyundai Elantra L4-2.0L Car Battery Replacement $595.91 $737.31 – $1133.56
2007 Hyundai Elantra L4-2.0L Car Battery Replacement $452.55 $556.72 – $841.60
2019 Hyundai Elantra L4-1.4L Turbo Car Battery Replacement $600.91 $742.54 – $1138.98

Source: yourmechanic.com

3. Get your battery cleaned.

Supposing your battery has a good amount of charge, then you don’t need to get it replaced. However, if there is corrosion, then you will need to get it cleaned.

You should be able to get it cleaned yourself by purchasing a chemical cleaner specifically for batteries. The cost should not go as high as $5, and you could simply use it according to product directions.

A thorough cleaning of the battery should establish a more reliable electrical connection that would put an end to the annoying issue with the alarm.

While you are at it, you can also have the hood latch sensor cleaned. This should be a very simple procedure that requires proper cleaning materials such as a brush and a brake cleaner.

4. Car alarm reinstallation.

One last thing you can do if the issue with your car alarm persists is to reinstall it. The initial cost of getting it installed should set you back between $100 and $500. But if the mechanic fails to install it properly, then you can have it reinstalled at no cost or no extra fee.

These are just some of the most common things you may want to try to resolve an issue with your alarm that keeps going off. If the cause is a super sensitive shock sensor, then you can adjust it, so it is not very sensitive. Some trial and error should help you figure out the correct setting that works for you.

Additional Tips To Consider

In some cases, a Hyundai Elantra alarm keeps going off because of bad weather. Perhaps there is a strong wind that triggers the alarm to go off. This is why you can also keep this in mind because you go through all the trouble of getting the car battery replaced or cleaned.

Also, you may also want to check if the doors are locked or perhaps start your vehicle as these could also help to fix this alarm issue.

By trying out these tips, these could spare you from a costly fix at the mechanic, especially if the issue can easily be resolved without a professional’s intervention.

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