What Causes a Car to Fail to Detect the Key?

[LiamFitz]

Here are the reasons why a car may fail to detect the key: 1. The key battery is dead. When you press any button on the key, check if the indicator light turns on. If not, the battery is low. Solution: Every remote key contains an electromagnetic coil that emits microwaves. The push-to-start button also has an electromagnetic coil to receive the microwaves and relay them to the car's computer, which analyzes whether the key matches. If the match is successful, the car will start. 2. The key battery may have poor contact with the in-car key sensor. Solution: Remove the key cover, rotate the coin battery, or take it out and reinstall it after a while. 3. Signal interference. Nearby electromagnetic interference or signal sources, such as around cameras, telecom towers, or high-voltage lines, may prevent the key from being detected. The issue will resolve once the car moves away from the area.