What Causes the Red Light on a Car Key to Illuminate?

1 Answers
SanCourtney
07/29/25 7:13pm
A car key may illuminate with a red light for the following reasons: 1. Normal phenomenon. Some car models have keys that light up red when pressed, such as the Arrizo 5. 2. If the car key lights up red and the car fails to start, with the dashboard also not lighting up, it indicates that the car battery is dead. This is likely due to leaving the headlights on when locking the car the previous day, causing the battery to drain. 3. If the red light is due to backlighting, it can be confirmed that the key was placed next to something red, causing it to pick up the color. If the car key does not function normally, it is recommended to use the mechanical key to start the car and drive it to a 4S shop or a professional auto repair shop. Identify the issue before proceeding with the appropriate repairs. Below is an introduction to car smart keys: 1. Car smart keys are a common keyless entry system, also known as an intelligent key system. They consist of a control system formed by a transmitter, a remote central locking control module, a driving authorization system control module, three receivers, and related wiring harnesses. 2. The remote control and transmitter are integrated into the car key. The vehicle can enter a locked or unlocked state based on signals sent by the smart key, and can even automatically close the windows and sunroof.
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