Experiencing issues with your 2019 Nissan Altima key fob? You’re not alone. Many Nissan owners encounter problems after a battery replacement or due to electronic glitches. This guide addresses two common Nissan key fob issues and provides straightforward solutions to get you back on the road.
Issue #1: “Invalid Key ID” or “No Key Detected” Messages After Battery Replacement
One frequent problem arises after replacing your key fob battery: the dreaded “Invalid Key ID” or “No Key Detected” message appears on your dashboard. Additionally, the door request buttons on your Altima might stop working. However, the key fob buttons for remote locking/unlocking and starting the car (remotely or by pressing the start button with the fob) often remain functional.
Solution:
This issue can typically be resolved with a simple reprogramming procedure. Here’s how to do it:
- Remove the Backup Key: Take out the mechanical backup key from your Nissan Altima key fob.
- Enter Your Altima: Get inside your 2019 Nissan Altima, ensuring the key fob is inside the vehicle.
- Cycle Ignition (Without Brake): Press the start button twice without pressing the brake pedal. This will cycle the ignition to the “ON” position.
- Exit and Lock: Open the driver’s side door, taking only the backup door key with you, and leave the key fob inside the car. Close the driver’s door.
- Manual Lock/Unlock Sequence: Insert the backup door key into the driver’s side door lock. Turn the key to the left to lock the door (you should hear the locking mechanism engage). Then, turn the key to the right to unlock the door (listen for the unlocking mechanism).
- Re-enter and Turn Off: Remove the backup key, re-enter your Nissan Altima, and press the start button one more time (again, without pressing the brake) to turn the ignition to the “OFF” mode.
After completing these steps, the “Invalid key ID” messages should disappear, and all key fob functions should return to normal.
Issue #2: Key Fob Buttons Not Working (Remote Lock, Trunk, Panic, Remote Start)
In contrast to the first issue, you might find that everything works as expected except for the push-button functions on your 2019 Nissan Altima key fob. This means the remote door lock, panic button, remote trunk release, and remote start (if equipped) are unresponsive.
Solution:
This problem often indicates that the key fob’s push-button functions need to be re-synchronized with your Nissan Altima’s computer (ECU). A “cold boot” of the ECU while the key fob is inside the car usually resolves this.
- Locate the Battery: Open your Altima’s hood and locate the main car battery.
- Disconnect Battery: Using a wrench, disconnect the negative terminal of the battery.
- Wait: Wait for a minute or two. This allows the ECU to fully discharge and reset.
- Reconnect Battery: Reconnect the negative battery terminal securely.
Alt text: Close-up of a hand replacing a CR2032 battery in a Nissan key fob, illustrating the process of key fob battery replacement for Nissan vehicles.
By disconnecting and reconnecting the car battery, you force a reboot of the ECU. When the ECU restarts with the key fob inside the vehicle, it typically reprograms the push-button functionalities of the key fob.
Important Note: Disconnecting your car battery will reset the ECU’s learned settings. Your 2019 Nissan Altima might idle slightly differently for the first few miles after this procedure, but it will quickly return to its normal operation as the ECU relearns.
Key Fob Battery Information
For battery replacements in your 2019 Nissan Altima key fob, the recommended battery is a CR2032. While a CR2025 battery, which is slightly thinner, can be used temporarily, it has a lower capacity and will not last as long as the CR2032. Replacing the key fob battery proactively, before it becomes critically low, can often prevent these reprogramming issues from occurring in the first place.
Reprogramming Both Key Fobs Simultaneously
For those with multiple key fobs for their 2019 Nissan Altima, it’s worth noting that both key fobs can potentially be reprogrammed at the same time. By leaving both key fobs inside the car when performing either of the procedures described above, you might be able to resolve issues for both simultaneously. While not always necessary, this can be a time-saving approach if you are experiencing problems with multiple key fobs.
By following these troubleshooting steps, you should be able to resolve most common key fob programming issues with your 2019 Nissan Altima and regain full functionality of your keyless entry system.
