What is the reason for the one-button start red light staying on?

[Pinto]

The reasons for the one-button start red light staying on are as follows: 1. Poor key placement: If the key is placed in the trunk, on the car floor, near the rear shelf, or under the front windshield, try placing the key in a visible location within the passenger compartment. 2. Low key battery: The remote key typically uses a standard button battery with a rated operating voltage of around 3.3V, and under normal circumstances, its lifespan can generally last up to 2 years. 3. Key chip issue: This may cause poor signal transmission or no transmission at all. 4. Faulty in-car oscillator or related issues: This can prevent the formation of an effective electronic oscillation zone, leading to the inability to scan and recognize the key.