Updated at: 28-03-2022 - By: Lucas

A key fob is a little electronic gadget that lets you open or start your car remotely.

It’s possible that even if your key fob has a new battery, it will eventually stop operating. So, if a new battery was installed in a Honda key fob, why is it not working?

Is a battery replacement enough for all key fobs?

When they switch to a new electronic system in a small number of cases, the system is reset. Reprogramming the key fob may be necessary in the event that it loses connection with your vehicle.

It’s not difficult to replace a battery at home, but the battery you buy should be authentic. In addition, be sure to take all the necessary safeguards when making the change.

If all else fails, you can always try reprogramming it, however this isn’t always the case.

It’s possible that the problem stems from a faulty installation, a defective key fob, or some other factor.

The following are the top three:

6 Reasons Why My Honda Key Fob May Not Work

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In the automotive industry, Honda is a well-known name, well recognized for its high-end SUV and sedan models.

Despite the fact that all Honda vehicles come with a keyfob, the remote start feature has been added to many models in 2019. Their reliability and 400-foot range make them one of the best on the market.

With all of these options, having a key fob that doesn’t work is a real pain. For the most part, the battery isn’t at responsible for most problems.

Even after replacing the battery, your key fob may still not operate. There are other considerations to consider in this situation.

  1. Key Fob May Have Been Reset

To use the key fob, it must be connected with the vehicle. The vehicle’s receiver unit communicates with the key fob’s transmitter.

Because of this reliance, no one else can unlock yours, not even someone who knows your car’s brand and model. You may feel comfortable and secure in your vehicle thanks to the added level of protection.

When you change your battery or replace your key fob, the connections may be reset, causing your car to no longer recognize you.

Your key fob will need to be reprogrammed to work with the vehicle again. It’s possible that you won’t be able to start the automobile unless you reprogram it.

One more question: Does your Honda key fob have a red light that doesn’t work?

It’s possible that you’ll have to reset your key fob once more. Original key fobs have this problem, but aftermarket key fobs are plagued by it. Owners of pre-owned automobiles have had similar experiences.

Programming a key fob is a simple process. You can do it yourself for earlier models, but you’ll need specialized equipment and software for newer ones.

Because of this, you may need to seek help from a locksmith or a Honda shop. This is a more expensive option compared to the first.

  1. Broken Key Fob

It’s also possible that the key fob isn’t functioning properly. Chances are you may have damaged the circuit or the keys if you attempted to change the batteries yourself.

The battery connectors, external cover, buttons, and so forth are all included.

The unlock button may be the problem in some cases. Open the trunk or use the panic button if necessary. If they do, it’s possible that your unlock button has been damaged, in which case you’ll need to purchase a new key fob.

If none of your key fob’s controls work, it’s possible that the key fob is faulty.

Having trouble with your Honda CRV key fob since replacing the battery? There’s a good chance you’ve fried the circuit.

It’s preferable if you use the remote with extreme caution and gentleness. Wear a glove to protect yourself from the electronics; bare hands aren’t safe.

I bet you have no idea how easy it is to break the casing.

A good rule of thumb to remember is to stick to the instructions in the owner’s manual. Even little deviations could result in damage to your device’s case, connectors, or circuitry.

  1. Damaged Transmitter

For the key fob to work, two components must communicate with each other.

The transmitter is located in the remote control, and the receiver is located in the vehicle in our case. Only through exchanging signals can the pairing be made to work.

The door is locked and unlocked, the car is started, and so on when they interact with each other. In the event of any damage to one of the two components, the key fob will no longer function.

Internal damage, such as loose connections, might also harm the transmitter. If something happens to the receiver, the same thing will happen.

You may not want to touch the key fob in this situation. If you’re willing to fork out the cash, have it fixed by a locksmith, mechanic, or even the dealership.

4. Wrong Installation

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Make sure you’ve placed the battery correctly.

You can find all the information you need about battery replacement in the owner’s manual. Before you put the battery in, did you make sure it was oriented correctly?

Unlike the negative side of the battery, which is typically marked, the positive side of the battery has no markings. The positive side is usually on the bottom, however this isn’t always the case.

5. Wrong Battery Type

Check your owner’s handbook before changing your battery, like I advised earlier.

It tells you exactly how to replace the battery and what kind you’ll need to buy.

Key fobs that have the improper voltage can cause them to malfunction, making them inoperable.

The battery terminals can be damaged if you try to force the battery in.

6. Broken Contacts

As a result of their frequent use, key fobs are subjected to a great deal of wear and tear.

As a result of this abuse, connections become loose, circuit boards become damaged, and even the buttons begin to malfunction. Carefully open and inspect the key fob controls and contacts.

Soldering missing or loose connections may be an option if you’re unable to locate the problem.

Don’t do this unless you’ve got some experience with circuit boards. Check the buttons to see if there is anything wrong with them. They may need to be pushed back into place on occasion.

How To Reprogram Your Honda Key Fob

I recently changed the batteries in my key fob. Do I need to re-program it? Key fobs that aren’t fakes don’t have this problem. However, using aftermarket components entails taking a risk.

Fortunately, most Honda key fobs can be reprogrammed by the user. The bad news is that reprogramming the remote for newer models of cars necessitates specialized software and equipment.

I’ve compiled all the information I’ve gathered so far on the subject of programming key fobs.

Gather all of your Honda’s key fobs. In spite of what you’re doing, the automobile will forget the rest.

Lock the doors and windows of your vehicle.

Do not turn the key all the way to the ignition position.

Simply hold down the lock button on your key fob for one brief second inside the first five seconds.

The key should now be in the “OFF” position.

Take a few seconds to repeat steps 3, 4, and 5 a second time.

In order to get it right the fourth time, only go through stages three and four. Reprogramming the key fob should produce a sound similar to that of the door locking.

You have around five seconds to use the second remote after pressing the lock button once.

Make sure all of your remotes are working by turning off the car.

All of your remote controls have been successfully reconfigured.

In addition, you may see the video here:

How Much Does A Honda Key Fob Replacement Cost?

A brand-new Honda key fob should set you back $300, but it might go as high as $450.

It depends on the model, make, and year of the vehicle. An aftermarket key, on the other hand, is less expensive. A case should set you back no more than $30.

How Do I Unlock My Car With A Honda Key Fob That Is Not Working?

Use a spare if it’s in your possession. If it doesn’t work, you’ll need to remove the Honda key fob from your pocket and use the key to unlock the emergency door.

There should be a hidden emergency key slot in the door handle close to the door’s edge, even though the automobile is keyless with a remote start. Using a key, remove the trim and access the hidden area

How Long Does The Honda Key Fob Battery Last?

Depending on how often you use it and how gently you treat it, the battery in your Honda key fob can last for three to four years. It may not last as long as expected if used in a grueling manner.


Changing a car battery is a simple enough task for the average person. Aftermarket key fobs in particular might cause the issue of the key fob being reset.

If this is the case, you may need to have the Honda key fob reprogrammed, which you can do on earlier models but not on later ones.

For whatever reason, it’s not the one I’ve just listed above. There may be further reasons why you need to call a locksmith or a car dealership.

However, if you know how to open a key fob, you can try to fix it yourself.