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How to Fix a Key Fob That isn't Working

If your key fob doesn't work then you can fix it by following some simple steps. The first step is to make sure that it's not the backup remote.

If the backup can lock and unlock your car doors then there's a likely issue with the primary remote. The most common causes of car remote key failure are battery or circuitry issues.

Battery

It is not unusual for the battery inside the car key fob to degrade. It is easy to replace batteries. However it is crucial that you use the correct type. You can refer to the owner's manual or contact the manufacturer to find out the right type. It is also a good idea to inspect the battery compartment carefully since dead batteries may leak harmful chemicals that can harm the remote. If replacing the battery does not solve the issue, there may be other issues that require professional attention. If the buttons are damaged or stuck for instance it might be necessary to disassemble the remote and rework each component. You could also try reprogramming the vehicle to recognize the new device.

Buttons

From frequent use, key fobs may get dirty and worn. This is not atypical however it can cause buttons to stop functioning or require a hard press for them to work. This can be very frustrating especially if you're out of town and need to start your vehicle. Fortunately, even worn out or malfunctioning buttons can often be fixed with a bit of time and a few materials you might already have in the house.

First, check that the batteries are up correctly and that the indentation on the back of the button is filled. Then, carefully remove the remote and look at the circuit board. Examine for signs of rust or other signs that the buttons are worn or damaged, like missing paint that is conductive. Utilizing the Q-tip, dipped in alcohol, gently clean any membrane contacts that have become damaged or have conductive paint missing. Do not rub too vigorously as this can damage the conductive paint, and block the button from firing when you press it.

Examine the battery connector's terminals carefully for any loose solder connections. Soldering them back to their original position will allow the button to function again If this is the case. The same procedure can be used to restore functionality to any other loose connections inside the fob.

In the end, if any of the buttons made of rubber on the front of the key fob have stopped working or remote key repair require a very hard press to work, it is likely that the graphite disks at the back of the button are deteriorating and need to be replaced. You can do this by rubbing a pen over the disks. This should bring the button back to life.

If none of these solutions work or you are unable to get the button to respond when you press it hard, it could be that the circuitry is failing. This can be fixed by a quick clean and replacing the solder, but it is ideal to have a spare fob in case this method fails for remote key repair you.

Circuitry

If the keys fob buttons are functioning the circuit board that is inside the remote could be dirty. This issue can be fixed by a thorough inspection. Broken and damaged cases are the most common causes of boards that are dirty. A broken case can let water and other debris into the circuit board, causing it to short. Water can also eat away at pins and connectors that are small on the board, referred to as via's.

If you're able to open your key fob and aren't afraid of making a mess, we can take the buttons out of their sockets and put in new ones. It's also worth examining the battery terminal connections. They can become extremely filthy and if they're not tight enough, the buttons might not function or even stay in their down position. Soldering the terminals, and putting the button back into place is typically all that's needed to return keys that are not in working condition.

Non-Remote transponder chips

Sealed non-remote key repair transponder chips are more durable than the remote fobs that have them however they are still susceptible to being cracked by a hole that is drilled into them or over by a lawnmower or electronic car key repair near me door handle. The majority of non-remote transponder chip failures can be attributed to blowing fuses.

If you're not comfortable opening the key fob, you can remove the circuitboard and utilize a multimeter to verify that the diode is working correctly. If you don't feel comfortable with this, visit your local Oreilly or hardware store and use their RF frequency tester. This will inform you whether the key fob sends signals.

Programming

Key fobs aren't impervious to destruction and are susceptible to damage by a variety of factors. They can lose their pairing to the car's receiver due to shock or a low battery, requiring the reprogramming. A professional auto locksmith or the main dealer can reprogram your key fob and get it back working again. If, in the unlikely event that resetting and fixing your key fob doesn't work it could be the time to replace it all over again.