How to Fix Honda Key Fob: Troubleshooting the Remote Transmitter

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The Honda key fob is an essential component for unlocking and starting your vehicle remotely. However, if you’ve recently replaced the battery in your Honda key fob and it still won’t work, there may be a few reasons behind this issue. In this article, we will discuss how to troubleshoot a dead key fob for a Honda Odyssey and provide potential solutions to get it working again.

Understanding the Potential Issues

There are three main reasons why your Honda key fob may not be working:

  1. Dead battery: While you may have replaced the battery, not all batteries are created equal. Some key fobs require a specific type of battery, and using the wrong one could lead to compatibility issues.

  2. Poor connection: Sometimes, the battery tabs inside the key fob may not make proper contact with the battery. This can happen due to the tabs being folded down, preventing the positive side of the battery from touching the metal piece inside.

  3. Poorly designed battery: In some cases, even a brand new battery may not work if it is poorly designed. Certain key fobs are more sensitive to battery quality, and using a subpar battery can result in malfunctions.

Step-by-Step Solution

If your Honda key fob is not working despite a battery replacement, follow these steps to troubleshoot and potentially fix the issue:

Step 1: Open the Key Fob

Begin by prying open the key fob using a small tool, such as a key. The Honda Odyssey key fob can be opened this way, but the process may vary slightly for other Honda models. Inside, you will find the battery compartment.

Step 2: Check the Battery Type

Once the key fob is open, check the battery type it requires. In this case, the Honda Odyssey key fob uses a CR2032 battery. Ensure that you have the correct battery type before proceeding.

Step 3: Measure the Battery Voltage

Using a multimeter, measure the voltage of the new battery. Ideally, the voltage should be around 3.3. A significantly lower voltage may indicate a faulty battery.

Step 4: Address Poor Connection

Inspect the two metal tabs inside the key fob. If these tabs are folded down, they may prevent the positive side of the battery from making contact with the metal piece inside. Gently fold the tabs upwards to ensure proper contact.

Step 5: Test a Different Battery

If the above steps do not resolve the issue, try using a different battery. For example, an Amazon Basics battery or an Energizer battery can be good alternatives. Measure the voltage of the new battery and ensure it meets the recommended range.

Step 6: Test the Key Fob

Insert the new battery into the key fob and press the buttons to test if it works. Look for the red light indicator that should blink when the buttons are pressed. If the key fob works consistently with the new battery, the previous battery was likely the culprit.

Step 7: Verify Battery Quality

Keep in mind that the key fob’s performance can vary based on the quality of the battery. While some batteries may have a higher initial voltage, they may not work well with the key fob. It is recommended to opt for batteries that have proven compatibility and positive user reviews.


In conclusion, if you’re experiencing issues with your Honda key fob after replacing the battery, it’s important to troubleshoot the problem before rushing to the dealership. By following the steps outlined in this article, you can identify potential causes such as battery compatibility, poor connections, or poorly designed batteries. By addressing these issues, you can save time and money by avoiding unnecessary trips to the dealership or purchasing a new key fob. Remember to always use the correct battery type and consider the battery’s quality to ensure optimal performance.