Car Key Fob Repair - How to Get Back on the Road Even If Your Keyless Entry isn't Working
Over time, key fobs could have issues, such as a losing functionality. Some issues may need professional attention, but most are fixable at home.
The first step is usually to change the battery. The majority of fobs are powered by flat watch-style battery, which can be easily found at hardware stores or auto parts stores.
Dead Battery
If the battery for a key fob dies, it can be a major inconvenience particularly if you're away from home. However, there are options to get back on the road if your vehicle's keyless entry system isn't working.
The first thing you should check is if the buttons on the fob are working. If they do, the issue may be in the locks of your car instead of the fob.
If the keys aren't unlocking you need to look for a key slot with a mechanical lock concealed in your door handle trim or in another location on the car (consult your owner's manual). Insert the mechanical key and try again. If this doesn't unlock the door, some cars have an application that lets you unlock it remotely. For example the FordPass Connect app, myChevrolet mobile app, and myMazda app permit owners to open their doors with their smartphones. However, these apps require a monthly fee.
You should also make sure that your key fob isn't draining your vehicle's battery by being plugged into it. A dead fob can drain your battery quickly particularly if it's used to control the TV or phone while you are watching.
Holding the key fob towards the start button could cause the key fob that has a low battery. This simple fix could save you from having to visit your dealer or certain Interstate All Battery Centers.
You can also find out whether your key fob actually dead by testing it in a different vehicle that has the push-button ignition. If it doesn't work, the fob battery probably requires replacement. This is why it's a good idea keep an extra key fob in a purse or backpack.
Damaged Buttons
If your key fob doesn't have the ability to open doors or start your vehicle remotely, it's possible that one or more of its buttons have been damaged. The key fob may contain an electronic circuit board that has "contact pads" for each button, and these little pads are coated with an electricity conducting film that wears down over time. The wear may cause your fob to react more slowly, or even not at all.
The pad that contacts a car keyfob can be easily replaced using a flat-head screwdriver. If try what she says is damaged or badly smashed it may be difficult to open. You'll need to take it to an auto shop to have the fob repaired.
It's not unusual for a key fob to be dropped on hard surfaces, walked on, or exposed to water. All of these events can cause physical damage, such as breaking and snapping keys.
This could also cause internal damage to the fob, which could lead to malfunction. This is why it's recommended to keep an extra key fob in your pocket or wallet in the event that you break the one you already have.
Make sure the battery is charged first if your key fob buttons aren't responding as they should. Be aware that key fobs don't come with a particular kind of electronic device; they're typically powered by the same batteries for two dollars that are used in watches and hearing aids and are available at drug stores, hardware stores, and even online.
If the battery is fine it's possible that the buttons are dirty or worn out and can be easily cleaned using a damp cloth to clean them. If they're still not responding, test a different key fob to determine if the issue is related to yours or with a specific type of car key fob. If the other fob functions, it's likely that the key fob you have needs to be reset or even replaced completely.
Reprogramming
The hidden world of car keys fobs is more complex than the myths that surround it suggest. Basic fobs function with radio frequency signals that are unique to each car. The fobs need to be correctly programmed to unlock and start the vehicle. Reprogramming a key fob is not as simple as pressing several keys. It's usually done by the dealer.
Refer to the owner's manual for detailed instructions. Certain manufacturers, like Mercedes utilize proprietary technology that only dealerships are capable of creating a new key fob, and then sync it to your vehicle. However some independent shops offer this service as well, so be sure to review reviews and prices prior to selecting the right shop.
Certain car models erase other fobs after they've been changed, so you'll have to have any additional fobs professionally programmed. This can be expensive particularly if your fob has stopped working. Even in the event that the mechanical key will not work to start the vehicle, it's a great idea to have a backup that can open the doors and trunk.
Be prepared for a difficult experience if you decide to reprogram your fob yourself. There are numerous guides available on the internet that promise success but you're likely to be disappointed. Many of these guides are written by people with no experience in this area and are often based on unsubstantiated claims. Some of them even state that you can program your own car key fob in just a few clicks, which is very misleading.
The majority of key fobs are held by a plastic clip that is easy to remove but the battery is inside the circuit board, which means you'll need to carefully pry it out using a device. Once you've gotten inside, you'll be able locate the button cell battery, which is usually a small watch battery that is available in most pharmacies or at home improvement stores. It's typically simple to replace the battery. Before replacing the whole unit, you can try replacing the button cell first.
Replacement
If your car key fob has been damaged or isn't functioning it is important to know there are several options to remedy the problem. It's as easy as replacing the battery or reprogramming the key fob, but a more in-depth repair may be required. It's also beneficial to keep a spare fob in case one is lost or stolen.
Most modern key fobs contain the physical key in addition the electronics they use, which makes them both more expensive and more difficult to replace than traditional keys. Some "smart fobs" even include remote starters. It's important to know that it can take up to an hour to cut and program an alternative fob for your vehicle.
Fobs make use of a tiny radio transmitter mounted on circuit boards to communicate with the car's receiver. Pressing a button activates the transmitter, and it transmits an RF signal that is unique to the car's receiver. The receiver recognizes the signal and checks it against the preprogrammed codes. This allows the driver to open the car and begin it from a distance without putting the key in the ignition or turning the lock.
If the buttons on your key fob do not respond or function intermittently it could indicate that they have been damaged by water or other causes. You can repair the fob if you take it apart and examine for damaged or non-responsive buttons. If this doesn't fix the issue, you can try reprogramming your fob or buying an entirely new one.
You should check with an auto dealer in your area or a locksmith prior buying a replacement keyfob on the internet to make sure it is compatible with the security system of your vehicle. Aftermarket fobs can be cheaper however, you must research brands and read reviews before trying to program them yourself. While some fobs are able to be replaced by a trusted locksmith, other models require special equipment for programming that can only be used by a vehicle dealer or auto technician.