Be On The Lookout For: How Car Key Immobiliser Repair Is Taking Over And What To Do About It

· 6 min read
Be On The Lookout For: How Car Key Immobiliser Repair Is Taking Over And What To Do About It

Car Immobiliser Repair

Car immobilisers became a requirement for automakers in the late 20th century, as hot-wiring cars became increasingly popular with thieves. The immobiliser blocks your car's engine from starting if the chip inside your key fob is damaged or does not meet.

This means that it is essential to get your car's key immobiliser repair done promptly if it's malfunctioning or damaged. Here are the most common reasons for your car's immobiliser failing to work:

Dead Batteries

Key fob problems are typically caused by the battery being dead. Battery problems are often caused by prolonged use, harsh environmental conditions or the aging process. If a battery is damaged, it can no longer transmit the signal required by the immobiliser, and operate the key fob. This could stop your vehicle from starting, and will need a professional repair the immobiliser system.

In most cases, a simple replacement can bring back an old one. A good coin-style battery can be purchased at your local hardware store or even at a general retailer for between $5-10. After purchasing a new coin-style battery, remove the old one and open the case. You'll find an opening or notch along the seam separating the bottom and top halves. Push the end of an screwdriver with a flathead or coin into the slot and then work around the edges to open the fob. Next, insert the new battery and snap the two halves of the fob shut. When you're done recycling the old battery at a collection center close to you.

If the new battery fails to solve the issue, it may be an issue with the RFID system within the key fob. The majority of vehicles with a push-button ignition design require the fob to be held up close to the ignition barrel in order to verify its presence and send the proper signal to allow the vehicle to start. If the RFID on the key fob does not communicate with the vehicle, you will need to have a new key made or take it to a dealership to repair the immobiliser.

If changing the battery does not resolve the problem it's worth disassembling the key fob and examining any buttons that seem to be not in the right place or are damaged. Because your key fob gets jostled about a lot during use It's not unusual for some of the buttons to become displaced or stuck in time.

Key to the Transponder is not working.

A transponder key that is faulty can have serious consequences. Transponder keys are different from conventional keys made of metal, which engage the ignition mechanically. They have an electronic microchip that sends an individual number to the immobilizer system of the vehicle to confirm its identity. This provides an additional layer of security, decreasing the risk of thefts and other vehicular crimes. However, as with any other electronic device transponder keys are prone to a myriad of issues that are related to the chip's functionality.

Transponder chips can be delicate and even a small physical damage can impact their capacity to function. It's vital to inspect your transponder keys for signs that indicate wear, as these can be the cause of an immobiliser malfunction.

Additionally, the internal microchip in a transponder key is also sensitive to water and other environmental conditions, which could affect its ability to communicate correctly with the vehicle's immobilizer system. Therefore, it is essential to keep your key fob and key chain free from water and other contaminants as much as possible.

It's also important to note that a transponder key has been specifically programmed for a specific vehicle, and altering any sensitive parts can lead to issues with compatibility that could impact its functionality. It's best to avoid any kind of modification to a vehicle key as long as you have the skills and tools to do it safely and effectively.

Fortunately, if you have an old key that is in need of repair or replacement, a professional locksmith can assist you. They can duplicate your key or create new keys, and program it to match the immobilizer system in your vehicle, ensuring that it works properly. This process isn't as simple as copying a normal car key made of metal, and it requires specialized tools to ensure that all of the right details are entered into the software.

Antenna or Receiver that is not working properly

The transponder chip in the key of your car transmits a signal to the ECU that allows it to verify whether the key is the correct one to start the car. If it isn't, the immobiliser system will stop the engine from being started. This is to deter thieves from using stolen or duplicate keys to gain access to your car's motor.


If the signal fails to reach the ECU due to a problem with the receiver or antenna, your car won't start. A professional auto locksmith will help you resolve these issues.

This can be down to a variety of reasons which include an antenna that isn't compatible or an electrical interference problem. Radio frequency interference is caused by heavy electrical equipment, lighting systems, computers, digital devices as well as cable television systems and transmitters. It's also possible that the coaxial antenna cable has become disconnected or damaged. This could happen if your pets play around the home, or if the cable is damaged during installation.

The receiver may be too far from the antenna. You can test this by connecting the receiver to a different antenna. If the error message remains, you might require a new antenna or redirect the coaxial cable.

Antennas do not really fail however they may get bent or pinched, or loose from the connector, which can cause the RF level to drop. Check if there is  car key repair company  between the antenna and the receiver such as a surge protector, splitter, or splitter, which could affect the strength of the signal.

If you are using the EEPROM method to program the car key, you will require the removal of specific modules (security components) from your vehicle and then read the "password" from them. This requires great expertise as the data could be damaged. A professional auto locksmith can minimize the risk by reading information directly from the module a specific tool.

Faulty Electronics

Many modern cars are fitted with security systems that stop the engine from starting if the car fob or key aren't present. These systems make use of RFID (Radio Frequency Identification) or immobiliser controls to authenticate a fob or key that is placed into the ignition. This can be a great method to prevent theft of vehicles however, as with any other piece of electronics it can occasionally go wrong.

If the security light on your dashboard is lit solid, it indicates that the car immobiliser isn't accepting the signal from the fob or key. This could be caused by a variety of reasons, including an insufficient battery in the fob or a physical damage on the key. If you're experiencing this issue, follow the manufacturer's instructions to perform a reset on the system, or contact an expert mechanic to get help.

When you insert the transponder chip in your key, it sends a code to your immobiliser in the car which is then compared to the codes that are stored in the computer. If the codes match, same, the engine will turn on and the immobiliser will shut off. If the immobiliser fails to detect the signal it will not turn over and you could be left stuck.

There are a variety of issues that can cause your car's immobiliser to cease working properly, but most of them are relatively easy and affordable to fix. A dying or dead keyfob battery is the most common culprit, and is easily identified with an easy diagnostic test. If this does not solve the problem, it could be due to other issues with the electrical system of your vehicle that are impacting the functioning of the immobiliser. If this is the case, a professional should examine your car's wiring and look for signs of damage or loose connections that may be impacting the performance of the immobiliser.

A car key immobiliser is an essential security feature that helps protect your vehicle from being accessed by unauthorized persons. They are generally safe, but they can occasionally fail and require repair or replacement. You can prepare for the odd glitch by knowing the most common symptoms and causes.