Why is the key light on in my Nissan Sentra?

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Regarding this, why is the key light on in my car?

The key light is telling you that the key is either not detected, or the key is not recognized. This could be the failure of the key, key battery, or an issue in the anti-theft/wireless control system. There is likely a procedure for starting the vehicle when the key is not recognized or the battery is dead.

how do I turn off the security light on my Nissan? Insert the ignition key and turn it to the on position and then attempt to start the engine (crank over), the engine wont start. With the key still in the run position wait 10 minutes and the security light should blink and then go out. Turn the key off and wait 5 seconds.

Just so, what is the security indicator light Nissan?

The security indicator light is located on the meter panel. It indicates the status of the NISSAN Vehicle Immobilizer System. The light blinks after the ignition switch was in the LOCK position. This function indicates the security systems equipped on the vehicle are operational.

How do you turn a Nissan Sentra key on?

Getting into Your Nissan

1. First, flip the key fob over, then push the small release latch.
2. Pull out the hidden emergency key from the bottom of the fob.
3. Insert the key in the driver's side door and unlock it to enter.