Car Key Fob Repair - How to Get Back on the Road Even If Your Keyless Entry isn't Working
Over time, key fobs may have issues, such as a malfunction. try what she says may require professional attention, but most can be resolved at home.
Changing the battery is often the first step. The majority of fobs are powered by flat watches-style batteries that is easily available at auto parts or hardware stores.
Dead Battery
It can be a real problem when a key fob's battery goes out. This is particularly true when you're away from home. However, there are options to get back on the road the vehicle's keyless entry system isn't working.
One of the first things to check is whether the buttons on your key fob function. If they do not it could be a problem in the car's locks.
If the keys won't unlock, look for a key slot with a mechanical lock hidden in the door handle trim or in another location on the vehicle (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. FordPass Connect, myChevrolet Mobile App and myMazda apps, for example, allow owners to unlock their doors with their smartphones. However, these apps require an annual cost.
Also, you should ensure that your key fob isn't draining the car'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're watching.
A key fob that's low on battery can be started by holding it up to the start button. This simple fix could save you from having to visit your dealer or to certain Interstate All Battery Centers.
You can also determine whether your key fob is actually dead by trying it in a different vehicle that has the push-button ignition. If it doesn't, you might need to replace the battery on your fob. This is why it's a good idea keep a spare key fob inside your bag or purse.
Damaged Buttons
It is possible that your key fob is damaged and has a button. The key fob may contain circuit boards with "contact pads" for each button, and these tiny pads are coated with an electrically conducting film which wears down over time. This wear could cause your device to respond slow or not respond at all.
The good news is that the pad inside the key fob of a car is easy to replace, and it can be done using a flathead screwdriver. If the case is damaged or badly smashed it may be difficult to open. You'll need to take it to an auto repair shop to repair the fob.
It's not unusual for a key fob to be dropped, trampled on, or exposed water. These incidents can cause physical damage, such as breaking the keys and snapping them.
It could also affect the internals of your fob which could result in a malfunction. This is why it's always a good idea to carry a spare key fob in your wallet or pocket in the event that you break the one you already have.
Check the battery first to determine if the buttons on your key fob aren't working like they should. Remember that key fobs don't come with a particular kind of electronic device - the majority of them use the same batteries for two dollars that are used in hearing aids and watches that are readily accessible at hardware stores, drug stores, and on the internet.
If the battery is functioning properly the buttons could be dirty or worn out. You can easily clean them with a damp cloth. If the buttons still don't work, you could try an alternative car key fob. This will help you determine if the problem is yours or an specific model. If the other fob is working it's likely that the key fob you have needs to be reprogrammed or even replaced completely.
Reprogramming
The secret world of fobs for car keys is more complex than many myths suggest. Basic fobs work with radio frequency signals that are specific to each vehicle. The fobs need to be correctly programmed to unlock and start the vehicle. Reprogramming a key fob is not as easy as pressing several keys. It's usually done by the dealer.
The procedure for reprogramming the fob depends on the make and model year of your vehicle and it's essential to refer to the owner's manual for step-by-step instructions. Certain manufacturers, like Mercedes have their own proprietary technology that guarantees only dealers can create a new fob and re-sync it to your vehicle. Some independent shops might offer this service, so check reviews and prices before selecting the right shop.
Certain car models erase all other fobs if they're programmed again. This means you'll need to have additional fobs programmed by professionals. This is an expensive proposition particularly if you're down to one functioning fob. It's always recommended to have at minimum a backup mechanical key that you can use to open the trunk and doors, even if it won't start the car.
Be prepared for a frustrating experience if you opt to reprogram your fob yourself. You'll be disappointed by numerous online guides that claim to be successful. Many of these guides were written by people who have no experience and are based on unsubstantiated assertions. Some of them even claim that you can program your car key fob in only a few clicks, which is extremely false.
The majority of key fobs are held by a clip made of plastic which is easy to remove, however, the battery is within the circuit board, and you'll have to carefully pry it out with a tool. Once you've got inside, you should be able to find the button cell battery which is typically a tiny watch battery that is available at most pharmacies or at home improvement stores. It's typically easy to replace the battery. Before replacing the entire unit, it's worth trying first.
Replacement
There are a variety of ways to fix a damaged or damaged car key fob. It may be possible to fix the problem quickly by replacing the battery or programming your key fob. However, a more extensive repair may be needed. A spare fob is useful in the event one is stolen or lost.
The majority of modern key fobs have a small physical key, in addition to the electronic components which makes them more expensive and more complex to replace than traditional keys. Some "smart" fobs even include a remote starter built-in. It's important to know that it can take up to an hour to cut and program the replacement fob to your vehicle.
Fobs make use of a tiny radio transmitter that is mounted on a circuit board to communicate with the car's receiver. By pressing a button the transmitter transmits an RF signal specific to the car receiver. The receiver recognizes the signal and checks it against the preprogrammed codes. This allows the driver to start the car from a distance, without the need to put the ignition key in.
If the buttons on your key fob do not respond or operate intermittently it could mean 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 resolve the issue, try reprogramming your fob or getting an entirely new one.
Before you purchase a replacement fob online, you should contact a professional locksmith or your local auto dealer to confirm that it is compatible with your vehicle's security systems. The fobs from the aftermarket can be less expensive but you should study the reviews and brands before attempting to program them yourself. While certain fobs can be repaired by a reputable locksmith, others require special equipment for programming that can only be used by a professional auto dealer or auto technician.