Remote Key Fob Repairs You Can Do at Home
You may be tempted, if your remote key fob doesn't working to take it to the dealership to have it reprogrammed. Try some quick fixes in your home.
Start by replacing the battery. Flat watch-style batteries are cheap and easy to find at hardware stores. You can then take a look at the key fob and look for buttons that are worn out or out of the right place.
Dead Battery
The key fob, a tiny electronic device, makes it simple to lock and unlock your vehicle. It uses a radio transmitter which transmits codes to a receiver inside your vehicle. Key fob batteries generally last for a long time, but they could die at any time. Look for the LED light or try pressing one of the buttons to see whether the battery is dead. If the key fob won't respond then the battery is dead and must be replaced.
Change the battery on a key fob is easy and quick. It's usually just an issue of opening the fob and pulling out the old battery, then putting in the new one. Fobs are powered by small batteries, similar to those used in watches or hearing aids which are sold at all kinds of stores and home improvement stores. They're typically shaped like a small coin and have plus and minus symbols on the bottom. If you're not sure what kind of battery your fob is using, check the owner's manual or look at the key fob itself for an identification label.
After key repair change the battery the fob's key should work as normal. If it doesn't work, there could be an issue with your vehicle or the system that is causing it to not function properly. If this is the case, you'll need to contact roadside assistance to resolve the issue.
You could be able to purchase replacement keys through a dealer or online, based on the model and make of your car. It's usually cheaper and more convenient to purchase a new key fob instead of to fix a damaged one.
Buttons aren't responding
If you've been driving for a while and notice that the buttons on your keys aren't working it could be due to an issue with worn out sensor for the button. Rubberized buttons on most fobs will wear down with time. This could cause them to function correctly when you press them in a certain manner or under extreme pressure. This is a common problem for many fobs, and can be easily fixable with a few DIY steps.
To unlock the car, the fob sends a signal to the receiver inside the car. If the receiver is damaged, it will not receive the signal and prevent the key from working to open or start the vehicle. This can be fixed by having your mechanic inspect the receiver to determine if there is damage. In many cases, this is cost-free or at a minimal cost depending on the make of your vehicle.
Key fobs that are used daily get lots of use and are often tossed around in pockets and purses which is why it's not a surprise that they sometimes become finicky and only function properly if they are placed in a specific way. This is an easy fix for the majority of fobs, as the buttons can be strengthened and fixed quickly with a little silicone and a little effort.
To get the buttons to work once more, press and hold the lock and unlock buttons on your key fob until you hear a chime in your vehicle. It is necessary to do this multiple times in order to get the button to activate. Then, you need to cycle your key in and out of the ignition for a couple of times to reset your fob's connection to the car. Once the connection is restored, you are able to remove the key from the ignition and then open your car with the remote. Repeat the procedure until your fob is working properly. If you cannot repair the fob by this procedure, it may be necessary to replace it. If you decide to replace the fob, make sure that it is programmed for your vehicle's model and make.
Keychain Loop Breaks
If the loop made of plastic on the key fob is damaged it won't work to lock or unlock your vehicle. The keychain loop is easily replaced.
Water damage and moisture can also cause key fobs to fail, with a variety of symptoms, including shortened range of operation or no function at all. Drying the key fob and replacing the battery could solve the issue, but sometimes an expert repair or replacement is required.
Key fob buttons may wear out over time, leading to less functionality or a lack of responsiveness. This could require a new key fob case or button replacement, but most of the time, the issue can be solved by changing the programming. Sometimes signals from nearby electronic devices could cause interference between the key fob and your vehicle and cause issues with locking or unlocking. It could be necessary to conduct a diagnostic test at the dealership in order to troubleshoot. This is usually the case for older electric key fobs that use infrared signals and require a clear line-of-sight to work however, the majority of modern microchipped key fobs use the challenge-response method of authentication using radio frequency to connect with your vehicle.
Corrupted or lost pairing
Over time, keyfob batteries lose power. If the battery has lost a lot of its charge, the remote could not respond to commands. Replacing the battery will usually fix this problem, but you may also need to change the programming of the remote.
Modern cars have key fobs that control many functions. They can lower and raise windows, turn off the alarm and turn on the interior lights and even start certain vehicles. It is common for car owners to accidentally press the wrong buttons. It is recommended to keep your owner's manual handy when you use your key fob, to be able to refer to the specific sections that deal with the various features of your vehicle.
Another common reason for the fob to cease working is that the signal has become corrupted or gone missing. Some of the more recent key fobs employ sophisticated technology for encryption of signals to keep thieves from intercepting signals and generating unauthorized key fobs or remotes that unlock cars. You'll likely need to visit an auto locksmith or dealer to re-program your fob and restore its function.
Some automakers offer their own instructions for reprogramming the key fob of their vehicles. In most cases, these processes are easy enough to be done at home. This method is not recommended for those who do not have a lot of experience with electronics. It is best to leave this type of work to experts.
Key fobs receive plenty of wear and tear, particularly when they are often used and handled. The buttons on a fob may be tossed around and the case may break or crack. It is important to have a spare key fob with you at all times, as this can save you time and trouble if your remote stops working while you are out and wandering around. It is ideal to keep it close to your bed during the night, as it will allow you to hit the panic button if you hear sounds in the house during the night.