Why Does My Car Say No Key Detected Nissan Altima?

Even if the battery in your Nissan fob is still good, there may be times when the car doesn’t recognize it. The battery is usually either dead or low, but your Nissan’s remote key functions could not be working properly. Reach out to our service department and we’ll be pleased to help if changing the battery doesn’t work.

Suitable Services

Either the car’s electrical control system or the key fob have an issue. On rare occasions, cell phone interference interferes with the system and produces problems that result in the “no key” warning light. I would first advise performing the complete re-programming procedure on the key fob to see if that fixes the problem. If not, programming a known-good key fob would be the next course of action. If it doesn’t fix things, any accessible software updates should be installed if the electronics controlling the system are flash programmable. The factory service manual contains a decision tree that can be used to “back in” to the problem’s beginning if that doesn’t fix it. In your situation, it is clear that the controller is transmitting a signal to turn on the warning light. However, if the key fob is fault-free and there is no external RFI/EMI interference, it is possible that the controller is malfunctioning. My best bet is that the problem is with the key fob, therefore you should start by reprogramming it or trying a different one. Request an electrical component/circuit diagnosis, and the YourMechanic-delivered qualified mechanic will take care of this for you if you want these steps carried out by a professional mechanic. Please don’t hesitate to get in touch with YourMechanic again if you have any additional queries or worries; we’re always happy to help.

The informative nature of the aforementioned claims warrants independent verification. kindly visit our

No key detected, according to Altima, despite the fob

Even if the fob locks and unlocks without a hitch, even from a distance, the 2019 Altima claims that no key has been detected. I hear a noise and then some clicking when I press and hold the start button. When I initially stepped inside to turn it on, a malfunction notice appeared.

Mechanic’s Helper: When did you initially discover the mistake? Does the vehicle still start with the key?

We appreciate you taking the time to let us assist you with this issue, and we hope to resolve it shortly.

Please keep in mind that since I don’t know your knowledge or skills, I might need to ask you some questions to get some fundamental information that will help me solve your particular problem.

Sometimes I might have to look for information regarding your issue before I can react, so please be patient. I’m grateful for your patience and will get back to you as soon as I can.

Prior to anything else, check the battery in your car. There ought to be 12.5 volts. You should attempt a jump start if you don’t have a voltmeter. Numerous issues will arise with a depleted battery. Next, check to see if your key fob has a functioning battery. You may lock and unlock the doors with the key fob remote. It should start after 30 seconds of turning the ignition on. If it doesn’t, use the actual key to lock and unlock the driver door and turn on the ignition for 30 seconds. If it still won’t start, there is a problem with the anti-theft system, and a scan tool will be needed to identify the issue.

You must use a scan tool to read the error codes (if any are stored) and to view the data in the antitheft module to see what inputs and outputs the module is recognizing in order to figure out what the issue is. This will reveal whether the key, receiver, module, or any other component of the system is the issue. I am unable to suggest a specific repair for this defect because there are no typical issues with it. If the module has any saved trouble codes, please let me know what they are so I can identify the root cause of this issue.


It would seem that the NVIS (immobilizer) system is content with the key IDs because the car starts.

There are three internal reception antennae (the fourth appears to be functional and accepts external remote unlock orders). If the vehicle won’t start without the slot, one or more of the internal antennae must be damaged (they are all wired to the BCM…so if there is no issue with the antennas, the BCM is the next logical stop).

You must have the CVT sedan, I suppose. Can you start the vehicle with the key fob positioned directly above the passthrough aperture into the cabin, below the deck of the rear glass, and close to the reception antenna? If so, it might simply be the front of the car’s antenna that is broken or unplugged (one in the centre console, one in the shifter console). the pictures underneath.

If all three antennas are present, connected, and appear to be in working order (you could try replacing one), and there is still no start without using the key slot, then there must be a problem with the BCM that controls each of these antennas. Of course, getting to the BCM is a major pain because it is up behind the instrument cluster.

Why does my automobile claim there were no keys found?

Key fob battery failure The most frequent cause of a keyless entry system failing to send signals is a faulty battery in the key fob. Use the extra key fob to unlock the car and turn on the ignition if one is available. Use the key that is included in the spare fob if it is not available to unlock the door.

Without a smart key, how can I start my Nissan Altima?

Kicking Off Your Nissan If your Nissan vehicle has a key fob port, you can insert the fob into the port and depress the clutch or brake pedal while pressing the START/STOP button. Simply step on the brake or clutch while pressing the key fob against the button if you don’t have a port.

How can I use a dead key fob to start my Nissan Altima?

This is how: Depress the little release button after turning the Nissan key fob around. From the key fob’s base, remove the concealed emergency key. To enter your Nissan, put the emergency key in the driver’s side door and open it.

Exactly why won’t my Nissan Altima start?

I’ve owned my Nissan Altima for a while now, and so far there have been no issues. It refused to start a few days ago, and it hasn’t been able to start since. Why won’t my Nissan Altima start right now?

In less than two minutes, find out if your auto insurance is being overcharged.

I’m sorry to hear that your Nissan Altima is having difficulties starting. There are several causes of your Nissan Altima’s starting problems. The most frequent causes are a dead battery, a broken alternator, or an issue with the engine starting.

Typically, an electrical component of the automobile, such as a dead battery or a damaged alternator, is to fault if your Nissan Altima won’t start.

If you think the battery is to blame, you can check its voltage at home using a multimeter to validate your suspicion. Your automobile battery is alright if you receive 12 to 13 volts, and the problem is somewhere else. The battery needs to be replaced if the voltage falls below 12.

The following are some more frequent causes of a Nissan Altima not starting if the battery is in good condition:

  • faulty alternator
  • Battery deterioration
  • Key fob battery failure
  • defective starter motor
  • inadequate alternator
  • worn-out ignition plugs
  • fuel pump malfunction

To correct the problem and avoid more harm to your car, you should bring it in for service right away.

While taking your car in for maintenance is a terrific method to keep safe, getting excellent car insurance coverage at a reasonable price is the greatest way to make sure you’re covered. Jerry can assist!

What does the Nissan Altima’s key emblem mean?

A security indicator light is that key with the silhouette of a car in your Nissan’s instrument panel. The goal of this light is to give you peace of mind that the vehicle’s security systems are functioning. When the ignition is in the OFF, LOCK, or AUTO ACC positions, it should blink.

What does Nissan’s automobile with the keylight mean?

The security indicator light is the Nissan car with the key inside in the instrument panel. The key warning light verifies that the security systems of the car are working.

The alarm and immobilizer system are probably in action when the key is not in the ignition lock or accessory position and the key light flashes.

Simply said, the red car sign on the Nissan dashboard will let you know if there is an issue or the anti-theft system is active.

When the engine ignition is turned to the OFF, AUTO ACC, or LOCK positions, this malfunction indicator light ought to flash.

If the security light on the dashboard illuminates when the engine is off, you shouldn’t be afraid because you can quickly start the car.

On the other hand, if the Nissan car key symbol on the dashboard is continuously flashing, there is a problem with the vehicle.

What should I do if the battery in my Nissan key is low?

You can resume using the key fob to start and enter your car once the battery in your Nissan smart key is replaced. The steps to follow to change the battery in your key fob are as follows:

  • When the battery died, you could still enter your Nissan by using the concealed key.
  • Remove the old battery and the key casing.
  • Place the negative side of the CR2025 battery upward before replacing it.
  • Reassemble the key fob and give it a try!

My Nissan key fob needs to be reset.

Reprogramming Nissan Intelligent Key Fob Do not turn the car on after inserting the key. Take the key out and carry out this action around six more times. Remember that success might not come for up to ten attempts. When the Nissan Intelligent Key is accepted by the vehicle, the hazard lights will flash twice.

Can a mechanical key start a Nissan?

Nearly all Nissan key fobs contain a mechanical car key concealed inside in case your batteries run out thanks to Nissan’s Remote Start Key. A small catch exists. You can get to the mechanical key by opening the bottom of the fob. The mechanical key will enable you to open your car and let you get inside.

Your keyfob is not required to start your automobile because the ignition button is built to function even if the keyfob breaks. Many automakers have even included a manual start option to the ignition button. Numerous cars, including Mazda and Ford models, have a key slot below the steering wheel. The fob can be inserted to start the engine.

If you don’t have a manual ignition key, push the button while pressing the fob against it. This backup strategy is used by several automakers to guarantee that your car will still operate if your keyfob malfunctions.

The Intelligent Key Remote Technology from Nissan is a ground-breaking development in the vehicle sector. To replace your Nissan key fob, you do not need to go for your local Nissan dealer, though.

Why won’t my key fob operate now that the battery has been changed?

A dead battery is the most frequent cause of a key fob not functioning. Having said that, your keyfob might be having more serious issues. You might require a key fob replacement or perhaps auto door lock repair if your key fob stops operating after a battery change.