What to Do If Your Transponder Key is Lost or Stolen

Losing a key is always a stressful situation. You may be lucky and find the key after you search around for a while. However, sometimes it turns out that your key is well and truly lost. If the key in question was your transponder vehicle key, the fix is not just as simple as going to the hardware store and having a new copy made. Transponder keys are so named because they feature an electronic antitheft security chip inside the head of the key that communicates with your vehicle’s computer when inserted into the lock.

Before you panic, we’ve compiled the following information into a guide to help you determine the best course of action if your transponder key is missing. By keeping a level head and following these tips, you’ll navigate this stressful situation with ease. You may even be able to prevent it from happening in the first place. Regardless of whether or not you’ve lost your transponder key, you may find this information helpful.

Is My Car Key a Transponder Key?

First, let’s go over what exactly a transponder key is so that you can know whether or not your vehicle has one and what it means. A transponder key is a vehicle key that usually has a plastic head, inside of which is an electronic microchip. This microchip is the transponder chip, responsible for transmitting and receiving electronic signals to and from your engine’s computer, respectively.

A unique, one-in-a-million numerical code is sent from your key to the engine and the engine responds. If the numbers match, the vehicle will be allowed to start up. If not, the engine will not recognize the key, and the engine will not start. Even if the key physically matches the pins and tumblers inside of the ignition lock, it won’t work without the proper transponder programming.

Ford was the first vehicle manufacturer to use a transponder key system, which they called Passive Anti-Theft System (or PATS) in 1996. It quickly spread among vehicle manufacturers who found transponder keys highly effective and affordable to implement. Even with keyless entry becoming the new standard for vehicle security, many remote key fobs also feature some form of transponder chip. So even if the item you’ve lost is not a physical key but instead a remote fob, it will probably need to be programmed by a locksmith or other certified professional.

Preventative Measures

Before we explain which steps you should take upon losing your transponder key, let’s start by giving a rundown of smart preventative measures you can take to lower your risk of losing your key to begin with. These are simple steps you can take that make losing your transponder key far less likely.

• Establish a Routine Involving Your Keys: Establishing a habit of checking that you know where your keys are when you’re not using them is a crucial part of ensuring they never get lost.
• Have a Spare (or Two): All security professionals, including the experts on our local locksmith team, recommend that everyone have at least one spare key made for each important lock in their life. This includes spare keys for each of your vehicles, your home, and your business.

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Pro Mobile Locksmith in Snellville- Transponder Key Problems

You may not be aware that the car key in your hands is more complex than you think. Inside of it, there is a small chip that has a very important function, called a transponder chip. The keys of most cars built after 1995 contain a transponder chip for improved security. The transponder chip communicates with your vehicle’s immobilizer and tells it to disarm so that you can start the engine. Basically, the transponder in the key sends some codes to the car. Of course, these codes need to be correct in order for the vehicle to allow you to start it. If the transponder does not send the codes or if the codes are not correct, your vehicle will not start, no matter how hard you try.

Malfunctioning Transponders: Serious Problems
In most cases, people think that the car is at fault when it refuses to start dues to a malfunctioning transponder chip. They tow the car to a mechanic and pay him to fix their car. Even though the problem is so simple, people can lose hundreds of dollars on towing and repair services. Of course, let’s not even mention the fact that you lose a lot of time and begin to be stressed by the problem. You won’t be able to drive your car to work until the problem gets solved. But what causes a transponder to cease working? Let’s find out!

Common Transponder Key Problems
Your car key looks pretty sturdy. It looks like it can take a beating. In fact, you have probably dropped your car keys on the floor several times already and nothing happened. The reality is that the transponder chip – just like any electronic device – is quite sensitive to shock. It can break the next time you accidentally drop your car key. When the transponder chip is damaged, it will stop sending the codes. Consequently, the vehicle will not receive a code and will not start when you turn the key in the ignition. The simple and effective remedy for this problem is to call a locksmith and ask him to replace the transponder chip or to duplicate the entire key.

Another problem can be caused by the battery inside your key. As any electronic device, the transponder in your key needs power from somewhere. The power is supplied by a small battery inside the key. If the battery dies, so does your transponder chip. Again, the chip will not be able to send the codes to the vehicle without power – and the vehicle will not start. This problem can be solved pretty quickly simply by replacing the battery in the key. A trained locksmith can help you do this, or you can do it yourself. If you attempt to replace the battery yourself, be careful not to damage the key or the transponder chip inside of it.

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