Why Is My Honda Key Fob Not Working After Battery Replacement?

Today we are going to discuss a problem that many people have with their Honda key fob.

Sometimes after you replace the battery, your key will not work anymore.

This can be very frustrating because sometimes it seems like there is no solution to this issue. But don’t worry.

We have compiled a list of things you can do to help fix the problem and get your car door unlocked again.

How To Fix Honda Key Fob Not Working After Battery Replacement

There are several reasons why your Honda Key Fob could not be working even after battery replacement. Below are some of the main reasons.

1. Faulty Chip

If your Honda key fob doesn’t work after you replace the battery, the chip inside of the remote may have gone bad.

You can test to see if this is true by putting a new battery in and pressing all buttons on both sides of the remote at once.

If they don’t do anything, then you’ll need to purchase a new remote.

2. Broken Key Fob Contacts

Remove And Clean All Contacts – If there are any dirt or other foreign objects preventing contact, then this could be why your keyless entry system isn’t working as it should.

This can happen from everyday use, so make sure to give everything a thorough clean before trying anything else.

3. Loose Battery Cover

Check The Fob’s Battery Cover and make sure the battery cover is on tight and not loose.

Sometimes these will come off when they’re just a little too big for their slot or if you closed them without lining up the locking tab with the groove in the fob case itself. A simple fix that may have been overlooked.

4. Damaged Key Fob Batteries Transmitter

There are a number of scenarios that can lead to the Honda key fob not working after battery replacement.

The most common one is damage caused by corrosion due to exposure from rain or saltwater for an extended period, which can cause erosion on and inside the transmitter circuit board.

Another possible scenario is if there was dirt between the transmitter antenna coil surface and its metal enclosure before installation into your vehicle, this could keep it from receiving signals clearly enough to work properly.

A final possibility would be if the damage occurred during installation, such as cracking open one side so much that it’s no longer airtight with another transmitter’s insides.

If any of these three situations apply, then you will need either a new remote control.

5. Wrong Battery Type

You will need to double-check and make sure that you are using a CR2032 battery, as this type of battery fits in all vehicles with keyless entry systems.

If your car’s model year starts before 2006 or has an alarm system installed (most likely after 2005), then there might be another type of battery needed for replacement.

6. Key Fob May Have Been Reset

If your Honda key fob is not working after a battery replacement, there may be an easy answer.

The car’s computer has likely reset the keys to prevent you from entering unauthorized areas of the system.

You need to manually reprogram each individual button on the remote to remember their assigned functions for it to work again.

Below is a video that shows how you can program your key fob entry.

How to Replace Honda Key Fob Battery

Check the battery life of your Honda key fob.

If it is below 25%, you should replace it with a standard CR2032 coin-style battery.

There are two ways that this can be done:

You can do it yourself by purchasing an inexpensive kit for around $20 and following instructions found on YouTube or other online sources.

OR, if you would prefer not to perform the replacement yourself, there are plenty of professional shops in your area that offer auto locksmith services, including replacing car keys at competitive prices.

The approximate cost of a replacement vehicle key fob is about $60.

A lithium-ion 18650 battery will cost approximately $30-$50, depending on the quality.

The cost for a replacement key fop battery is around $60, but you can typically do it yourself for as little as $20.

How Long Does the Honda Key Fob Battery Last?

The batteries on a Honda key fob typically last around five years, but they may not work for as long in some cases.

Often, it will depend on how the car is driven and what kind of environment the battery has to endure.

Other factors can rob your Honda vehicle’s remote from its power supply, such as corrosion or being dropped too many times.

How Much Does a Honda Key Fob Replacement Cost?

Replacing a lost or broken Honda key fob can be a costly process. Replacement keys, especially for newer model Hondas, are expensive and difficult to find online.

It’s also a time-consuming process that requires the vehicle owner to visit a local dealer to have the key reprogrammed by an authorized technician.

Typically, the process involves the owner dropping off their vehicle at a dealership where technicians reprogram the key for that specific model and perform other necessary services.

How Much Does a Replacement Key Cost?

Replacing a Honda key is not an inexpensive process.

If you’re looking for just the replacement remote, the cost of that will depend on which model you need, how old it is and where you purchase it.

Numerous online stores are selling used/aftermarket replacement remotes for different Honda models. A quick search returns results like the following:

  • Honda Replacement Remotes (used) – Amazon – $12.00
  • New Honda Key Fob – AutoZone – $89.99
  • OEM Factory Honda Key – Pep Boys – $110.00+ ($100 Without Programming)

Most key replacement costs will be high if you’re purchasing a replacement key from an online retailer.

That being said, if you’re still interested in saving money, the price of just a replacement remote is not much different than that of an OEM factory key.

Dealer prices are also high at around $100 without programming or over $200 with programming.

However, there are some ways to save by purchasing OEM replacement keys from an online retailer.

How Do You Unlock a Car When the Fob Doesn’t Work?

The most basic way to unlock a car is with the key. But if your Honda fob not working, what do you do?

The answer may surprise you—you use the emergency release located inside one of your doors.

This will open any door, but it only works from outside (or for drivers) and cannot be locked again when closed.

I’d recommend calling roadside service or AAA so they can come over and get you back in your vehicle.

Do Aftermarket Key Fobs Work?

Aftermarket key fobs will not work.

In fact, they can do more harm than good because the car won’t recognize them, and you’ll have to manually start your vehicle whenever you use it.

Honda dealerships recommend getting a new OEM key fob as soon as possible.

On Honda Key Fob Not Working After Battery Replacement

Keyless entry remotes are wonderful, primarily when they work without any issues.

But sometimes, even the most reliable of them break down for seemingly no reason whatsoever.

As frustrating as it may sound, this actually happens quite frequently, but there’s often an easy fix that doesn’t require going anywhere near a car dealer or mechanic – all thanks to some simple DIY tricks and tips I have shared above.


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