Why Nissan security indicator light is on?

To give an answer to this question, we should see the different circumstances involved here including indicating the common causes that will be listed below.

  • System bulb check
  • Check light for anti-theft system and its functions
  • Battery Failure
  • Wrong Smart Key
  • The anti-theft immobilizer system is malfunctioning

Each of the causes listed above may or may not be a problem that needs to be fixed. Therefore, you should look at each one individually to determine if any repairs need to be made.

For instance, the system bulb check and the check light for the anti-theft system is not a problem that will need to be fixed. Instead, these are only automatic status checks for the anti-theft system.

These checks are initiated every time the car is turned on to signify that the anti-theft system is working correctly.

On the other hand, if problems like a battery failing cause the alerts, the battery may need to be replaced immediately. Whatever the situation, here’s what to expect when this indicator appears on your dashboard.

In Check Status Mode Only

  • System bulb check only- light appears briefly when the car is turned on
  • Anti-theft system check – light flashes or illuminates when it is functioning properly.

Check status mode for security indicator lights will come on automatically whenever a Nissan’s ignition is placed in the “off”, ‘lock”, or “acc” position.

These checks are designed to indicate that the vehicle’s Immobilizer system is in normal operation. So, there is no need to look any further for a problem that needs to be addressed.

In Alert Mode for potential problems with the anti-theft system

  • Battery Low/Failing – computer loses tracking info related to the key
  • Wrong Smart Key
  • The Anti-theft immobilizer system is malfunctioning

Battery Low/Failing

Typically, if the security indicator light stays on and/or the car’s engine does not turn over, the problem may due to a failing battery.

In these situations, the security system will not be able to read specialized codes from the key fob. Therefore, the security indicator light will stay on until the battery is recharged or the old battery has been replaced.

Wrong Smart Key

If the light security indicator stays on (i.e. instead of blinking intermittently), something is wrong that needs to be corrected. One of the most likely causes is inserting the wrong key into the ignition.

The fix in this situation is to replace the wrong smart key with the right smart key for the vehicle.

The anti-theft immobilizer system is malfunctioning

If the Nissan security indicator light stays on without blinking, you may need to take your vehicle to a nearby auto shop for an inspection.

The most likely cause of this problem is normally a malfunction in the anti-theft immobilizer system.

How do I turn the security indicator light off in Nissan cars?

To turn the security indicator light off in a Nissan vehicle, there are several different things that you can do. The method that you use, however, is dependent on the problem that you are encountering.

For example, if the security indicator does not automatically go off after replacing a bad battery, you will need to reset the anti-theft immobilizer system. Just follow the steps provided below.

  • Step 1: Make sure all of the windows are rolled up.
  • Step[ 2: Step out of the car and then lock all the car doors.
  • Step 3: Walk away from the vehicle by approximately 10 to 12 feet.
  • Step 4: Wait about 15 minutes before going back to the vehicle.
  • Step 5: Unlock the car door

After following these steps, the security indicator will be reset and you should be good to go.


The Nissan security indicator light is designed to relay key information to the car owner every time the ignition is turned on. And, in most cases, the light will blink or illuminate to note that the anti-theft immobilizer system is functioning correctly.

So, there is normally no real reason for alarm.

Nevertheless, if the security indicator stays on without blinking, there is a potential problem that needs to be addressed, including one of the following: a bad battery that must be replaced, using the wrong smart key, or the anti-theft immobilizer system malfunctioning.

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