Problems with Transponder Keys

What is a Transponder Key?

A transponder key is a security feature found on older vehicles that utilizes a transponder chip in the key fob. This transponder chip is encoded with a unique number code. When you insert your key into the ignition lock, an electronic signal is sent that matches the key code to that of the engine.

If they don’t match, the engine won’t start. If they do, the interaction goes seamlessly and you never notice. If an issue happens anywhere along this system, it can cause problems with your car that can impede and even prevent it from functioning.

If this happens without you noticing prior hints of anything being wrong, it can leave you effectively stranded and requiring an emergency call to a locksmith.   

Although for many years considered an effective antitheft measure, transponder keys have fallen out of favorite in recent years due to being replaced by keyless entry systems and remote starters. However, many vehicles on the road   

Problems that Can Occur with Transponder Keys    

Of course, even if your car utilizes a transponder chip system, it’s possible that your vehicle issues may not be due to transponder key problems. By ruling out problems with your transponder key system first, you can then proceed with the costlier process of having your vehicle evaluated by a  mechanic.   

#1: Transponder Key Gets Stuck  

Your transponder key fits into your lock, but when you try to turn it or take it out, it gets stuck. Maybe it gets stuck before you can even turn the car on. Or maybe you can run the vehicle, but when it comes time to shut it off and take the key out, the key is hopelessly stuck in the ignition lock.

Trying to twist it or budge it inevitably only makes the situation worse. In these scenarios, locksmiths actually recommend that you do not try to manipulate or yank on your key very much to extract it. Usually this problem is caused by warping or damage to the key or the makeup of the wafers inside of the lock cylinder itself.

This type of strong-arming will usually make the damage worse. It’s best to call in a locksmith if you can’t get your key out after trying to twist it back and forth multiple times.   

#2: Transponder Key Breaks

You may not think it possible but sometimes without warning your transponder key can break off, with half of the key inside the lock and the fob in your hand. This can prevent you from using your car even if you have a spare key in the vicinity because the lock is blocked.

If you are at home, you can try to use tweezers, needle-nose pliers, or another similar implement to pull out the broken piece (or pieces) of metal. If, however, you are away from home, or if this technique doesn’t work due to the metal being stuck inside too deeply, it’s best to contact a local locksmith like Johns Creek Mega Locksmith.

This can also occur if you have a so-called “switchblade” transponder key, which opens with a flick.