Notes

The 10 Scariest Things About Remote Key Repair
How to Fix a Key Fob That isn't Working

If your key fob doesn't work and you're not sure why, you can fix it with a few simple steps. The first step is to make sure it's not the backup remote.

If your backup remote cannot lock and unlock the doors of your vehicle, it is likely that the main remote is not working. Most problems with car remote keys result from circuitry or battery problems.

Battery

It is not uncommon for the battery in the key fob for cars to wear out. It is easy to replace the battery. However it is crucial that you choose the right type. You can refer to the owner's manual or contact the manufacturer to inquire about the right kind. It's recommended to examine the battery compartment thoroughly, as dead batteries sometimes release caustic chemicals that could harm the remote. If replacing the battery does not fix the problem there could be other issues that require attention from a professional. For example, if buttons seem stuck or broken, it may be necessary to take the remote apart and rebuild its components. You could also try reprogramming the vehicle to recognize the new fob.

Buttons

From repeated use, key fobs can become worn and dirty. This is not atypical, but it can cause buttons to cease functioning or require a hard press for them to function. This can be frustrating, especially when you are away from your home and you need to start your car. Fortunately, even worn-out or malfunctioning buttons can often be fixed with a bit of time and a few items you have in the house.

First, ensure that the batteries are up correctly and that the indentation on the back of the button is filled. Then, carefully remove the remote and examine the circuit board. Look for car key repair near me of corrosion or other indications that the buttons are worn out or damaged, such as missing the conductive paint. Use a Q-tip dipped into rubbing alcohol to gently clean any membrane contact that is damaged or where conductive painting is missing. Avoid rubbing too hard, since this could cause damage to the conductive paint and stop the button firing when the button is pressed.

Also, carefully check the battery connector's terminals for a loose solder connection. Soldering them back in place can restore the button's functionality if this is the situation. You can follow the same procedure to restore functionality to any other loose connection inside the fob.

In the end, if any of the buttons made of rubber on the front of the key fob have stopped functioning or require a difficult press to function it is likely that the graphite disks on the back of the button are wearing down and need to be replaced. You can do this by rubbing a pencil over the disks. This should bring the button to life.

If none of these solutions work, or if you still cannot get the button to respond when pressed hard, it is possible that the circuitry has failed. This can be fixed by a quick clean and re-soldering, but it is recommended to have an additional fob on hand in the event that this method doesn't work for you.

Circuitry

Whether or not the key fob buttons function the circuit board that is inside your remote may be dirty. This issue can be fixed through a thorough examination. Broken and damaged cases are the most common causes of boards that are dirty. A broken case can allow water and other debris to get into the circuit board, which can cause it to short. Water can also damage pins and vias, which are the tiny connectors that are found on the board.


If you're skilled enough to open your key fob, and aren't afraid of making an mess, you can remove the buttons from their sockets and solder in new ones. It's also worth checking the connections between the battery terminals. They can get very dirty and if they're loose, the buttons might not function or may even remain in their down position. Soldering the terminals and button's back in place is usually all that's required to return the key fob that is not working to working condition.

Non-Remote transponder chips

The non-remote chips that are sealed are more durable than remote fobs. However, they can be cracked when a hole is made into them or in the event that a door handle of a car or lawnmowers plows over them. The majority of non-remote transponder chip failures can be blamed on an exploded fuse.

If you are not comfortable opening the key fob, you may take the circuit board off and use a multimeter to determine if the diode is operating correctly. If you're unsure about doing this, head to your local hardware store or the Oreilly's and they will usually have an RFID frequency tester that can tell you whether the key fob sending signals.

Programming

Key fobs aren't indestructible and can be damaged by a lot of things. They may lose their connection with the receiver in your vehicle due to shocks or a low battery, which calls for reprogramming. A professional auto locksmith, or a dealer in the main, can reprogram your key fob and get it back up and running again. If, in the unlikely event that resetting or repairing your key fob fails it could be the time to replace it entirely.

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