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Car Key Repair - How to Fix a Dead Remote

Car remotes offer great convenience to drivers. They can unlock doors, open trunks and even start the car. Remotes that work with these remotes may stop working at the most inconvenient of instances.

Before you go to the dealer, you can try a few quick fixes when your key fob stops working. These tips could save you money.

Keyless Entry System

Instead of fumbling around with keys in your pocket or purse instead, stroll up to your car, hit a button on the key fob and then unlock the doors and start the engine. It's a simple function that makes driving a car more comfortable and safe. But, like all devices, the keyless entry system may be damaged by repeated use or because of other reasons. If you've encountered issues with your keyless entry system, there are two options: visit the dealership or contact the local locksmith.

The way a keyless entry system operates is by releasing radio signals, and then searching for a corresponding response signal from the key fob. If the system recognizes the signal, the car's doors are unlocked and the onboard computer activated. Some systems have an additional transmitter in the trunk of the car which opens it when you waggle one foot underneath it.

Each key fob has a unique digital identification code, which is given by the manufacturer. A unique process of technology known as "programming" is used to configure the fob to work with the specific car's system. This typically involves turning the ignition of the vehicle multiple times in a particular sequence. It could also require pulling or pushing various levers and buttons or taking out fuses.

Once a key fob has been programmed into your car's keyless system it transmits a digital identity code and a function code that tell the car what to (lock the trunk, unlock it or open the trunk). The receiver on the car confirms the identity of the transmitter through an authentication and encryption process. The computer on board will unlock the vehicle and start the engine if it is authorized.

There are concerns that a skilled criminal could intercept the code that's transmitted between the key fob and the car. This will require a device that records the transmission, and then retransmits it later in the event that the system doesn't want it to. To help combat this, most keyless entry systems rely on a method called rolling code, which ensures that each new transmitter signal received by the car has a different counter than the previous one.

Batteries

The most common cause of a car remote key fob not working is a dead battery. It's an easy and cheap fix in the event that you have a spare key fob on in your possession to replace the previous one with. The majority of fobs are powered by watch-style batteries that are available at hardware stores or big-box stores for less than $10. You can find the steps to disassemble the key fob on the web or in your vehicle's manual.

Be careful not to harm any circuits or antennas inside the case after you've removed your battery. They are likely holding the key fob's program to your particular car and tampering with them can cause it to become impossible to program (and likely to fail). If you must move the key fobs, be cautious. Some key fobs may have fasteners that can easily open and scatter key fob pieces all over your living space.

Most key fobs come with one hole that allows an screwdriver or similar tool to open the case, however it's a good idea to put your tool on the outside of the case first, as if you were peeling an orange or apple. Be careful not to apply too much pressure, as the fob case is often made of plastic and can break or crack if apply too much pressure to it.

Be sure to match the size and style of battery to the key fob when you replace it. Some key fobs have two batteries while others only require one. The wrong battery could make your remote key fob useless.

After the new battery has been put installed, test your key fob for the second time to see if it solves your problem. If this doesn't work, you will be required to determine if your fob is experiencing something more complicated that requires a specialist diagnosis. You may need to have the key fob reprogrammed at an authorized dealer or purchase an entirely new one.

Buttons

The buttons on your key fob may appear small but they're loaded with electronics. It's not a surprise that they're destined to fail from time to time. If the car key button suddenly stops working, you can generally fix it yourself.

One of the most common reasons why a car key car repair remote fails to function is that dirt or crud has accumulated between the buttons. To clear this up remove the batteries and scrub each button by using a cotton swab, coated with alcohol rubbing. Make sure to dry them thoroughly prior to replacing the batteries.

It's possible that your key fob was damaged in some way, like being dropped on concrete or accidentally scratched. If this is the case, you can test the functionality of your key fob by using another one.

The door lock sensor could have stopped working in your car. It's a tiny metal part that's connected to the door lock button on your key fob, and it's not common for this sensor to break after long-term usage or exposure to harsh weather conditions. Press your key button a few times without locking or unlocking your doors. This resets the sensor.

If all else fails, you could always test the operation of the spare key by attempting to unlock and lock your doors using it. If the spare key does not work, it might be necessary to locate a 24-hour locksmith that offers car key repair to make your remote work again.

You can reprogram your computer if your car key remote repair key button is working however it doesn't lock or unlock the vehicle. If you've used the same key fob a time, it might require reprogramming every few months in order to to work with your vehicle key repairs. This isn't the best option but it's better than having to replace your remote completely.