How to start a Toyota with key not detected warning message

If you are a Toyota owner, you might come across a “key not detected” warning message on the dashboard that can prevent the car from starting. This issue can be a nuisance, but it is not uncommon. Fortunately, there are some troubleshooting steps that Toyota owners can take to resolve the problem.

What causes key not detected error

The ‘key not detected’ alert only appears in Toyota vehicles equipped with start-stop button. A keyless entry system with a start-stop button is a modern vehicle feature that allows the driver to start and stop the engine without inserting a physical key into the ignition. Instead, the driver carries a small electronic device called a key fob, which communicates wirelessly with the car’s computer system.

To start the engine, the driver simply enters the car with the key fob in their pocket or purse, depresses the brake pedal, and pushes the start-stop button. The car’s computer system verifies the presence of the key fob and, if authenticated, sends a signal to the engine to start.

This system provides convenience and security, as the driver does not need to fumble with a physical key or worry about locking themselves out of the car. However, it also means that if the key fob is lost or malfunctions, the car may not start or may display a “key not detected” warning message. In such cases, troubleshooting steps may need to be taken to diagnose and resolve the issue.

The ‘key not detected’ message appears when the vehicle’s computer system is unable to detect the key fob or remote transmitter, which can prevent the engine from starting.

Key fob battery is dead

If the battery in your Toyota key fob is dead, you will not be able to start the car using the start-stop button. Fortunately, replacing the battery in your key fob is a quick and easy process that can be done at home.

To replace the battery in your Toyota key fob, follow these steps:

  1. Determine the type of battery your key fob requires. This information can usually be found in the owner’s manual or by searching for the make and model of your key fob online.
  2. Purchase a new battery that matches the specifications of your key fob.
  3. Remove the metal key from the key fob.
  4. Locate the small slot inside the key fob and use the metal key or a small flathead screwdriver to pry it open.
  5. Carefully remove the old battery from the compartment and replace it with the new one, taking care to align it properly.
  6. Close the key fob by snapping the two halves back together.
  7. Test the key fob to ensure that it is working properly.

If you are still experiencing issues with the “key not detected” warning message after replacing the battery, you may need to contact your local Toyota dealer for further assistance. They can provide additional troubleshooting steps or replace the key fob if necessary.

Starting your Toyota with dead key fob battery

If you find yourself in a situation where the battery in your Toyota key fob is dead and you need to start your car, there is a simple workaround that can get you back on the road. By touching your key fob directly to the start-stop button and pressing the button, you can start the engine without a functional battery in the key fob.

Here’s how to start your Toyota using this method:

  1. Hold the key fob against the start-stop button.
  2. Depress the brake pedal with your foot.
  3. Press the start-stop button as you normally would to start the engine.

By touching the key fob to the start-stop button, you are bypassing the wireless communication between the key fob and the car’s computer system. The start-stop button will be able to detect the presence of the key fob at close range, allowing you to start the engine.

Keep in mind that this method is only a temporary solution, and you should still replace the dead battery in your key fob as soon as possible to avoid future issues. If you continue to experience problems with the “key not detected” warning message, you may need to seek professional assistance from your local Toyota dealer.

Author: Nabeel K

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