Experiencing issues with your Nissan Altima 2015 key fob after a battery replacement can be frustrating. Many owners encounter problems like “Invalid Key ID” messages or unresponsive door request buttons after swapping out the old battery. Fortunately, these common problems often have simple solutions you can perform yourself without a trip to the dealership. This guide will walk you through troubleshooting two frequent Nissan key fob issues and getting your Nissan Altima 2015 Key Fob Replacement working smoothly again.
Issue #1: “Invalid Key ID” or No Key Detected After Battery Change
One of the most reported problems after a nissan altima 2015 key fob replacement battery change is the dreaded “Invalid Key ID” or “No Key Detected” message appearing on your dashboard. You might also find that the door request buttons on your car handles stop working. However, the key fob buttons for remote locking/unlocking and trunk release might still function normally. You can usually still start the car by physically pressing the start button with the key fob itself.
Solution: This issue can often be resolved with a simple key fob re-synchronization process. Here’s how:
- Remove the emergency backup key from your nissan altima 2015 key fob replacement.
- Enter your Nissan Altima, ensuring the key fob is inside the vehicle.
- Press the start button twice without pressing the brake pedal. This will cycle the ignition to the “ON” position without starting the engine.
- Exit the car, leaving the key fob inside. Take the backup door key with you.
- Close the driver’s side door and use the backup door key to manually lock the door by turning the key to the left in the door lock cylinder. You should hear the locking mechanism engage.
- Immediately unlock the door by turning the key to the right in the door lock cylinder. Again, you should hear the unlocking mechanism.
- Remove the backup door key and re-enter your Nissan Altima.
- Press the start button one more time (again, without pressing the brake pedal) to turn the ignition to the “OFF” mode.
After completing these steps, the “Invalid Key ID” messages should disappear, and all key fob functions, including door request buttons, should be working correctly with your nissan altima 2015 key fob replacement.
Issue #2: Key Fob Buttons Not Working After Battery Replacement
In contrast to the first issue, some Nissan Altima owners find that after a nissan altima 2015 key fob replacement battery change, all push-button functions on the key fob stop working. This means the remote door lock, unlock, panic button, and remote trunk release become unresponsive. However, the car may still recognize the key for starting and door request functions.
Solution: This problem typically indicates that the key fob needs to be re-programmed to the car’s ECU (Engine Control Unit). A simple ECU reboot with the key fob inside the car can often resolve this.
- The easiest way to perform a cold reboot of the ECU is to disconnect the car’s main battery. Locate the battery under the hood of your Nissan Altima.
- Using a wrench, disconnect the negative battery terminal (usually marked with a “-” sign and often black).
- Wait for a minute or two. This allows the ECU to fully discharge and reset.
- Reconnect the negative battery terminal securely.
During this ECU reboot process, if your nissan altima 2015 key fob replacement is inside the car, the push-button functions of the key fob should be re-programmed automatically.
Important Battery Information for Your Nissan Altima 2015 Key Fob Replacement
For your nissan altima 2015 key fob replacement, the correct button cell battery is a CR2032. While a CR2025 battery will physically fit and work in a pinch, it is slightly thinner and has a lower capacity. Using a CR2032 will ensure longer battery life and optimal performance for your key fob. Replacing the battery proactively, before it completely dies and causes intermittent issues, can help prevent the need for these reprogramming procedures altogether.
Reprogramming Both Key Fobs
If you have two key fobs for your Nissan Altima 2015 and are experiencing issues with both after battery replacements, you can attempt to reprogram both simultaneously. Simply leave both key fobs inside the car when performing either of the procedures described above. While not always necessary, this may save you time if both of your key fobs are malfunctioning after a nissan altima 2015 key fob replacement.
