The automotive industry has recorded a tremendous improvement in the past decades. There have been several changes in various components and compartments of most recently manufactured vehicles.
One of those significant improvements is the computerized systems that enable most recent cars to use a keyless remote or key fob.
This feature makes starting your vehicle, shutting it off, locking and unlocking the doors very easy. However, the challenge is that the remote uses batteries, and they can run out.
This article reveals what you ought to do whenever you experience a keyless remote battery low situation. So, if you drive a modern car fitted with electronic operations like a keyless remote, I’m sure you need this piece of information.
It doesn’t matter the make or model; this information is also helpful in addressing low remote batteries on CRVs.
What Is a Key Fob Battery?
A vehicle with a keyless entry system is locked and unlocked using a small electronic device called a key fob . It has a short-range radio transmitter that sends distinct codes to a receiver in the vehicle.
A key fob battery powers the electronic circuits within the fob. Most car manufacturers use non-rechargeable button cell batteries, which are small round lithium batteries commonly used in watches, thermometers, and calculators.
Because the key fob relies on its battery to function properly, it’s important to know when to replace it.
What Does The Keyless Remote Battery Low Message Mean?
The keyless remote battery low message indicates that the battery in one or more of your car’s remote keys is low. To get rid of this warning message, you need to replace the battery in the keyless remote with a low battery charge.
The battery replacement procedure is different for different key fobs, but the basics are the same and most key fobs share the same type of battery. Let’s take a look at what you can do when the keyless remote’s battery is low.
What Are Keyless Remotes?
Keyless remotes, also known as key fobs, are small devices that allow you to wirelessly control certain functions of your vehicle.
They are designed to make your life easier by providing convenient access and operational control. Here are the key points to keep in mind:
- Keyless remotes are used for various purposes, from unlocking and locking your car doors to opening the trunk or even starting the engine.
- These remotes are typically compact in size, fitting comfortably in the palm of your hand or attaching to a keychain.
- They work through radio frequency signals, communicating with your car’s onboard computer system to execute the desired commands.
How Do Keyless Remotes Work?
To better understand how keyless remotes function, consider the following:
- When you press a button on your keyless remote, it sends a specific radio frequency signal to your car.
- The car’s computer system recognizes this signal and carries out the corresponding action, such as unlocking the doors.
- The remote and the car are programmed to communicate with each other using a unique code or identifier, ensuring that only your remote can control your vehicle.
What Are the Signs of a Low Key Fob Battery?
There are a few things that point to your key fob battery being low:
- The keyless remote isn’t very responsive
- Its range decreases, so you need to be closer for the unlock button to work
- Push button engines might not recognize the key and have difficulty starting
- The little LED light on the keyless remote is off or very weak
- Your car may have a warning light that points to a keyless remote battery low
Now that you’re certain about a low fob battery, let’s see how to replace it to avoid having a fob with a dead battery.
The most common reasons your remote key fob isn’t working
If you’ve replaced the batteries in your remote key fob and it’s still not functioning properly, it could be caused by an internal electrical problem, a mechanical failure with your car’s locks, or a simple case of deprogramming.
The most common causes of this problem include:
- Damaged key: Did you recently step on your key or drop it in a puddle? Water damage or physical trauma can cause a remote key fob to stop working—in which case you’ll need a replacement from a mechanic or dealer.
- Loose buttons: Maybe the key isn’t fully damaged; the buttons might just be sticky or loose. Try disassembling the key fob and cleaning out any debris or grime that might be interfering with the buttons.
- Broken battery connector terminals: While your fob is disassembled, check the battery terminals. Are they loose or damaged? If so, find someone to solder them back into place.
- Faulty locks: If all that doesn’t fix your problem, the issue might be with your car’s locks, not the remote. Check to see if the locks work without the fob, and get them repaired if necessary.
- Deprogramming: Your key can be deprogrammed if you press the buttons too many times while out of range or if your car battery is disconnected.
What to Do When the Keyless Remote Battery is Low?
When the battery gets low in your remote key fob, it’s important for you replace it before it dies completely. The process is simple and doesn’t require special tools in most cases.
If you can’t get in the vehicle until you change the battery, you may be able to unlock the car with an app, the hidden key, or use a spare key.
#1. Replace Battery.
The easiest and best solution is to replace the key fob battery before it dies. Hopefully, you have the batteries on hand, and it won’t be difficult to follow the instructions listed out below.
For around $5, you can be back to using your car the way you are used to. I discuss how to replace the key fob batter yourself later on in the article.
However, not everyone has these special batteries lying around. In these cases, you may need to temporarily move on to one of the other solutions.
None of these are meant to be a long-term solution – they are only intended to get you by until you buy a new battery.
#2. Remote Unlock App.
Depending on what type of car you drive, you may be able to use a special app to unlock your vehicle. Many of today’s automakers now offer these solutions, making life even easier.
As long as you have your smartphone and you’ve previously set up the account, you should be good to go.
Here are a few manufacturers currently offering unlocking functions through an app.
- Audi: The myAudi App allows you to remotely unlock your car if the key fob dies.
- BMW: The Connected Drive App allows you remotely unlock your luxury vehicle.
- Chevy: With the myChevrolet Mobile app, you can unlock or lock your vehicle remotely. It also allows you to view the fuel levels and tire pressure for maintenance purposes.
- Ford: If you have a 2017 or 2018 vehicle, you may be able to use the SYNC Connect system. Newer models have the FordPass feature that gives you even more access without a key fob.
- Honda: Your compatible Honda may have a subscription to the HondaLink app that provides keyless entry. It also provides 24-hour roadside assistance for emergencies.
- Nissan: With the Nissan Connect app, you can remotely access your compatible vehicle.
- Toyota: The Toyota Remote Connect system lets you manage the vehicle by giving you the ability to lock or unlock doors and the trunk.
Many other car makers are also including these types of apps for customers. It’s important that you check into it before you need it because registration is usually needed ahead of time.
Additionally, there can be service fees to use the programs, as not all of them are offered for free.
#3. Hidden Key.
Some key fobs offer a hidden key inside that can be used when needed. If you see a small button or release on the side, this could be the ticket to getting the key to come out.
When the key fob is dead, you can use this hidden key to lock and unlock the doors. While you don’t want to continue relying on it, this key can get you out of a jam.
#4. Spare Key.
When all else fails, you can use a spare key. Even if your car didn’t come with one when you bought it, we recommend investing in a second key, just in case.
There are some keys that cost a good amount of money, but you will be thankful for this spare when the time comes.
If there are no other options or you don’t have a spare key, you are only left with a few other choices.
You can call a locksmith to get into your car, but this costs a lot of money. Otherwise, you can get a ride to get a battery or have someone pick it up for you.
How Do You Unlock Your Car With a Dead Fob Battery?
Car manufacturers considered the dead battery issue when designing the fob. They’ve installed a backup mechanical key (a physical key) inside the fob, so you don’t have to visit a service center.
Here’s how to access the mechanical key:
- Locate and press the small release switch behind your fob.
- Remove the battery cover.
- Open the fob to access the spare metal key — and voila, you can now open your car!
You can also refer to your owner’s manual to check where to find the physical key.
Additionally, some manufacturers have a remote unlock app you can use to get into your car with a dead remote battery:
- Ford: You can access your car using the SYNC Connect or FordPass feature
- Honda: Honda Motor Company vehicle owners can access the HondaLink app
Troubleshooting a Key Fob Not Working
When it’s not working, you might be tempted to jump right to a replacement. First, follow these steps to determine what’s wrong.
Step 1: Check the battery
If it’s unresponsive at all, works inconsistently, or has a short range first check that the battery is good. Replace it with a new one and test it again.
Step 2: Inspect for damage
If the key fob works intermittently or certain functions or buttons don’t respond at all, it could be damaged inside.
Check for worn-out buttons, loose internal connections, or corrosion inside. Sometimes, the case can be replaced, or you might need the entire fob.
Step 3: Test the second fob
If you have a second fob, check that it’s working normally. If it is, that tells you the problem is with the first fob, not the vehicle.
Step 4: Check for interference
If the key fob works intermittently, in certain locations, or only at very close range, there could be signal interference.
Test the key fob in an open area with no other vehicles or tall buildings around. If it works better, interference was the issue.
Step 5: Reprogram the key fob
If it’s stopped working suddenly and completely, it might’ve lost pairing with the vehicle. Follow the instructions to re-pair it, although many models require a dealer or locksmith to do it.
How To Change Keyless Remote Battery
Changing your car’s low remote batteries can be very easy, but you must ensure that you get the appropriate battery for the remote and fix it correctly so that it can work.
These steps will help you change your car’s low or dead keyless remote battery.
Step 1: Open the fob/remote
Once you get the correct battery for your car’s keyless remote from a reliable automobile accessories dealer, the first step is to open the remote. It’s pretty easy to know how to open the key fob to replace the battery.
To do this, use an object that can help you to pry the remote open carefully. You probably may not be able to open it with your hands. Ensure first to loosen the screw holding the two parts together (if any).
Step 2: Remove the old battery
After opening the remote, ensure to check how the original battery is placed, taking note of the positioning and the signs facing up on the battery. The batteries are typically round and fixed in a rounded position.
Once you note the correct position of the battery, remove the old battery by first sliding it out (if there is an open space by the side).
If that doesn’t work, check out for any clips that may be holding the battery in place; then, carefully push the clips aside, and slide out the old battery.
Step 3: Fix the new battery
After removing the old battery, fix the new one with the old battery’s same order. You see why you needed to take note of the position of the old battery!
Step 4: Close/lock the keyless remote/fob
Once you correctly fix the new battery, proceed to reverse the process you used in opening the remote to enable you to lock it back. Ensure that you observe the holes and the sides pointing into them to fix them correctly.
Benefits Of Keyless Remotes
Keyless remotes offer several advantages that enhance the convenience and security of your vehicle. Here are the key benefits to note:
- Convenience: With a keyless remote, you can quickly lock or unlock your car doors without fumbling for keys, making it easier to access your vehicle.
- Enhanced security: Keyless remotes use encryption and rolling codes to prevent unauthorized access, reducing the risk of theft.
- Remote start: Some keyless remotes allow you to start your car’s engine remotely, so it can warm up or cool down before you get in.
- Emergency functions: Certain remotes have panic buttons that can sound the car’s alarm or flash the lights, helping you locate your vehicle in crowded parking lots or alerting others to potential danger.
Do I Need to Reprogram the Key Fob after Changing the Battery?
Typically, you do not need to reprogram the key fob after changing the battery. However, if you’ve replaced not just the batteries but also some of the internal wiring and electronics, you may need to reprogram it by pairing it with your vehicle once again.
The usual sequence for reprogramming your car battery is as follows:
- Put the key into the ignition
- Turn the key into the ON position (which switches on the instruments and screens but not the ignition) and then turn it back to the LOCK position.
- Do this several times until you hear a chiming sound (or some other sound indicating a reset)
- Press the lock and unlock position on your key fob to reprogram it. This should ensure the correct functions are saved and that the vehicle will respond the next time you use it.
How much does it cost to replace the key fob battery?
It is quite cheap to replace your car’s key fob battery. The cost of replacing your car’s key fob battery is estimated at around $3.70 to $9, with tax inclusive. The price does not include labor because it is free.
A car accessories dealer will necessarily help you replace your car’s key fob battery without charging you a dime when you buy it from them. The cost of replacement may differ from one dealer to another and from one location to another.
Protecting The Keyless Remote From Electronic Devices
Understanding Interference From Other Devices
When it comes to keyless remotes, it’s important to understand that they can be affected by interference from other electronic devices.
This interference can lead to a drained battery or even malfunctioning of the remote. To protect your keyless remote from electronic devices, here are a few key points to keep in mind:
- Certain devices, such as smartphones, tablets, and laptops, emit electromagnetic waves that can interfere with the signals from your keyless remote. This interference can cause the remote to use more power, resulting in a low battery.
- Other electronic devices like wi-fi routers, baby monitors, and bluetooth devices can also cause interference with the signals between your keyless remote and your vehicle. This can lead to reduced range and increased battery drainage.
- Physical barriers such as walls, metal objects, and even other vehicles can obstruct the signals from your keyless remote, causing interference and draining the battery faster.
Tips To Minimize Interference And Extend Battery Life
To ensure that your keyless remote battery lasts longer and to minimize interference from electronic devices, here are a few useful tips:
- Keep your keyless remote away from other electronic devices, especially when not in use. Store it in a separate compartment or pocket to avoid any interference.
- Avoid placing your keyless remote near wi-fi routers, as they can emit strong signals that can interfere with the remote’s operation. Keep it at a reasonable distance to reduce the chances of interference.
- If possible, turn off or move away from other electronic devices that may cause interference when using your keyless remote. This includes smartphones, tablets, and laptops.
- Be mindful of any physical barriers that may obstruct the signals between your keyless remote and your vehicle. Try to position yourself in an open space without any obstructions when using the remote.
- Regularly check the battery level of your keyless remote and replace it when necessary. A low battery can result in a weaker signal, making the remote more susceptible to interference.
By understanding the potential interference from other devices and following these tips, you can protect your keyless remote from electronic devices and extend its battery life.
Keep these points in mind to ensure that your keyless remote always functions optimally, providing convenient and reliable access to your vehicle.
Preventive Measures for Keyless Remote Battery Issues
While dealing with a keyless remote battery low warning which is part of owning a modern vehicle, there are several steps you can take to minimize the frequency of such issues and prolong the life of your key fob’s battery:
- Regularly Check Battery Status: Make it a habit to check the battery status of your keyless remote periodically. Many vehicles provide information about the battery’s health through the onboard computer system.
- Carry a Spare Battery: Keeping a spare battery in your glove compartment or at home can be a lifesaver when you’re suddenly faced with a dead key fob battery. This simple step can save you from getting locked out of your vehicle.
- Use Keyless Entry Backup: Most vehicles with keyless entry systems also have a physical key hidden within the remote. Familiarize yourself with the location and usage of this key in case your key fob becomes unusable due to a dead battery.
- Key Fob Care: Handle your key fob with care. Avoid dropping it, exposing it to water, or subjecting it to unnecessary physical stress. These factors can impact the battery’s lifespan.
- Battery Replacement Schedule: Consider establishing a routine battery replacement schedule for your key fob. Even if it hasn’t shown any signs of a low battery yet. This proactive approach can prevent unexpected issues and disruptions.
- Keep Your Vehicle Updated: Modern vehicles often receive software updates that can address various issues, including battery-related concerns. Make sure to keep your vehicle’s software up to date to benefit from any improvements in keyless entry technology.
FAQs.
Q: How long will a low-battery key fob last?
If you are asking, “How long do I have in a keyless remote battery low situation,” here’s the time frame. The durability of a low-battery key fob is relative to whether it is a smart key fob or a regular fob.
A low-battery smart key fob will last for as long as 2 to 3 years, while a regular key fob with a low battery will last up to 4 to 6 years, respectively.
Since it said that nothing lasts forever, it will be reasonable to take cognizance of the time frame allotted to any device in your possession. Your car and each of its components are designed with a time frame of durability.
Your usage style and maintenance culture determine whether those components will reach their full expected lifespan. It is no exception for your car’s key fob.
If you are wondering, “How long is Honda keyless remote battery low situation managed before the replacement of the battery?”
In some cases, the time mentioned above frame may be attainable, while the expected period may not be attained in other cases.
Q: Can a low battery key fob cause the car not to start?
Yes, a low-battery key fob can cause your car not to start. Your car’s key fob is an electronic device fitted with a battery that powers the transmission of signals from the key fob to your vehicle.
The computerized systems in your car receive the alerts according to the instruction you press on the key fob; then, the vehicle responds accordingly.
The battery in your car’s key fob is vital to this operation; hence, if it becomes low, you may not be able to start your vehicle, except by a jumpstart. If your Honda keyless remote battery is low, it can alter your ability to start your car.
Q: Can you drive a keyless car without the key?
Of course, you can drive a keyless car without the key fob. Modern cars with computerized systems do not require traditional car keys to operate them. They function with buttons and a keyless remote.
If you own a keyless car, you can drive it without the key fob, provided the engine is running. You will be able to drive the car, shift gears, and park without any challenges. However, you must ensure that the car’s engine never shuts off.
Since the key fob is responsible for starting the car, allowing the engine to shut off when you know that the key fob is out of reach is a problem because you will not be able to start the car anymore until you seek help from an auto technician.
Q: Can I drive with a keyless remote battery low?
When your car’s keyless remote battery is low, you will still be able to drive around, shift gears, and even park. The key is not required for the car to run once you start the engine properly. You can drive for a long time without a key fob or remote.
One thing you must not allow to happen is to let the car go off. If the car’s engine turns off while the remote battery is low, you may have difficulty figuring out how to start the car and get going.
If you are contemplating what to do in a situation of a low remote battery on Acura, the best thing to do when your car’s remote battery is low is to replace it asap!
Q: What type of battery does my car remote need?
Once you notice a malfunction in the proper operations of your car’s remote, it is most likely that the battery is low or dead.
In this situation, the best thing to do is to replace the battery so that you do not have a hard time over-clicking or looking for someone to help jumpstart your car.
Some of the common types of batteries your car’s remote needs are CR2032 3-Volt and CR2025 Volt batteries. You can check out automobile parts or accessories dealers to get a replacement for your car’s remote low battery.
Q: How long do car remote batteries last?
Your car’s remote battery is expected to last between 3 and 6 months under normal circumstances. The battery is not for a lifetime, so knowing the battery’s lifespan will enable you to prepare for a replacement when necessary.
Although your car’s remote battery is expected to last around 3 to 6 months, it may be less due to different circumstances such as improper usage style, storage, etc.
If your car’s remote battery drains faster than necessary or it doesn’t last as it ought to, try to consult a professional auto technician to find out why.
Q: Do dealerships replace key fob batteries?
Yes, dealerships replace key fob batteries, especially when bought from the dealerships.
Most dealerships include this service to make it easy for car owners to replace their key fob batteries when necessary. It will only take a few dollars to get a replacement for your car’s key fob battery.
Final Words
Correctly understanding what to do when you have a keyless remote battery situation can save you from unnecessary worries or, better yet, from being stranded.
Since most modern cars come with computerized systems that ensure you are not caught unaware, you must maximize them.
Check out your car’s dashboard for the keyless battery low warning light; take every slight malfunctioning of your car’s remote seriously, and replace the battery when it is necessary for you to do so.