Immobilizer car with a key warning light. What are the symptoms of bad immobilizer? new for 2022

You’re driving down the road and all of a sudden your immobilizer light comes on. What does this mean?

Immobilizer car with a key warning light.
Immobilizer car with a key warning light.

This can be a scary experience, not knowing what’s happening with your car. You might think that you’re about to get stranded on the side of the road.

Today, we will provide you all information relating to Immobilizer car with a key warning light and some signs to help you recognize What are the symptoms of bad immobilizer? Through this post, you can grasp some useful information relating to this topic.


Immobilizer car with a key warning light

Immobilizer car with a key warning light
Immobilizer car with a key warning light

Immobilizer car with a key warning light comes on if your anti-theft system doesn’t sense the car key being used, or if it’s registering low battery power.

This prevents the engine from starting, even if the key is turned. The light will usually come on when the key is first inserted into the ignition, and will go out after a few seconds. If it stays on, or comes on while the engine is running, it means that there is a problem with the immobilizer system.

What is an engine immobilizer?

What is an engine immobilizer?
What is an engine immobilizer?

An engine immobilizer is an electronic device fitted to a vehicle which prevents the engine from running unless the correct key is present. It’s a theft prevention measure which works by storing a key’s transponder information in the car’s computer, and only allowing the engine to start if it detects the right transponder signal.

Its function is to prevent a car from being hot-wired and stolen by a criminal who lacks the necessary keys to start the engine.

How does a car immobilizer operate?

How does a car immobilizer operate?
How does a car immobilizer operate?

The engine immobilizer is a security device that is fitted into the ignition system of a car. It works by storing a code in the car’s computer which corresponds to the transponder chip in the key. When the key is used to start the car, the code is read and if it matches, the car will start. If the code does not match, the car will not start.

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The engine immobilizer is a passive security device, which means that it does not require any input from the driver in order to work. It is automatically activated when the car is turned on and deactivated when the car is turned off.

Can we drive with the immobilizer warning light on?

Can we drive with the immobilizer warning light on?
Can we drive with the immobilizer warning light on?

This warning light typically illuminates only when the key is not recognized, so you need not be concerned if it illuminates while you are already driving. If this occurs, try removing and reinserting the key if you are having difficulties starting your automobile. If you are having problems, make sure that the key fob is not out of power.

What are the symptoms of bad immobilizer?

What are the symptoms of bad immobilizer?
What are the symptoms of bad immobilizer?

Problems with locking a car

When you use a key to remotely lock your vehicle’s doors, you will notice that they do not lock. It’s a solid indicator that your car’s immobilizer isn’t working properly. Many modern automobiles lack outside keyholes, making it hard to unlock the doors manually with the key.

Difficulty to starting the car

Additionally, if your car does not start when you turn the key, or if it takes longer than usual for your car to start, these may also be signs of a bad immobilizer.

Problems with unlocking a car

You are unable to access your vehicle’s doors using the smart key, which is another sign of immobilizer problems. If you lock the door from the inside, you won’t be able to get back into your car since your key won’t unlock it. At this point, you’ll need to call a locksmith to unlock the door.

Key does not turn when it is in ignition

If your key fob contains a physical key that you must place into the ignition and crank and it does not move, the transponder chip within the key fob base may be faulty. It is not delivering the security code to the auto immobilizer for some reason.

This is often due to water damage (water + electronics do not mix) or real chip failure as a result of the fob falling or being crushed.

Car alarm issues

If the car alarm goes off for no reason, it is a sign that your immobilizer system is not working properly. A car alarm going off intermittently or randomly is another sign of trouble.

How do we repair the immobilizer failed?

How do we repair the immobilizer failed?
How do we repair the immobilizer failed?

Repair the failed immobilizer by changing the key fob’s battery

If your vehicle’s immobilizer isn’t working properly, the first thing you’ll want to check is the key fob’s battery. If the battery is dead or dying, it will prevent the immobilizer from working correctly.

1.Remove the key fob from your car.

2.Look for a small screw or panel on the back of the key fob.

3.Remove the screw or panel to access the key fob’s battery.

4.If the key fob has a coin-type battery, use a coin to twist it open. If it has a button-type battery, press the button to release it.

5.Remove the old battery and insert a new one. Make sure that the new battery is facing the right way before you put the key fob back together.

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6.Put the key fob back together and test it to see if it works properly. If it doesn’t, you may need to replace the key fob.

Ways to fix micro chipped keys (most modern immobilizers)

1. Try with different keys.

2. Turn on and off the ignition 5-6 times.

3. Start the engine for 5 minutes, then switch it off and resume it.

4. Take the battery out for 5 minutes.

5. Disconnect the batteries for 5 minutes, then connect the positive (+) and negative (-) cables to dissipate any little electrical charge in the electronics.

6. Wait 5 minutes before reconnecting the battery with the ignition key in the on position.

Get in touch with your nearest car dealer

It’s possible that the problem stems from a recently replaced ignition key, a new ignition switch, or a lock cylinder. If this is the case, your car dealer may be able to make a new key key with the correct microchip for the new ignition lock cylinder.

Contact with local locksmith

If you’re having difficulty starting your car, or if your key won’t unlock the door, a local locksmith can help. They can create a duplicate key based on the pre-installed microchip in your original. This chip, along with the VIN (vehicle identification number), which allows the vendor to identify the immobilizer unit used for the automobile, may allow the shop to produce a working, effective duplicate and repair the immobilizer difficulties.

FAQs Immobilizer car with a key warning light

What does the red car light with key mean?

A security fault code is shown by the red key warning light. This light glows when the vehicle control modules detect the ignition being cranked with a key that has not been programmed to the car or when there is an error in the vehicle’s security protocol.

Why does nissan intelligent key warning light car won’t start?

There are a few reasons why the Nissan Intelligent Key warning light might come on, and the car won’t start. One possibility is that the battery in the key fob is low and needs to be replaced. Another possibility is that there is something wrong with the car’s ignition system. If the problem is with the car’s ignition system, it will need to be repaired by a qualified mechanic.

How can we reseet the key immobilizer?

To reset the immobilizer, press and hold the panic button for five seconds. 
Then, for ten minutes, push the lock button twice and stand 10 meters away from the vehicle.

How to switch turn off the immobilizer light?

The immobilizer light is usually located on the dashboard of your car. If it is on, it means that the immobilizer system in your car is activated and you will not be able to start the engine.

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To turn off the immobilizer light, you will need to deactivate the immobilizer system. This can usually be done by pressing a button on the key fob or by entering a code into the immobilizer system. Once the immobilizer system is deactivated, the light should turn off and you should be able to start your car. If the light does not turn off, there may be a problem with the immobilizer system and you should take your car to a mechanic to have it checked out.


Our team from have provided some knowledge about immobilizer warning light car with key. If your immobilizer is activated, you will see a key symbol illuminated on the instrument panel and the engine will not start. The system is designed to prevent thieves from stealing your vehicle. If you see the key symbol illuminated, do not start the engine. Have your vehicle towed to an authorized dealer for service. Hopefully, this post is helpful for you!

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