What Could Be the Reason When the Car Key Has Power but Fails to Unlock or Start the Engine?

[CamillaMarie]

If the car key has power but fails to unlock or start the engine, you can try using another key to see if it can activate the central locking system. If it cannot, this rules out the possibility of a dead battery and confirms an issue with the central locking system. Below is some relevant information about car keys: 1. Lifespan: The battery in a car remote key typically lasts about 3 years. When the battery runs out, you need to open the key casing to replace it. Car owners with good DIY skills can replace the battery themselves, as it is a relatively simple process. 2. Precautions: The remote key contains a chip, so be careful not to damage it during disassembly. Otherwise, replacing the chip can be troublesome and costly. The key casing is generally not waterproof, so avoid submerging the remote key in water, as this can damage the chip. When using the remote key, try to avoid long-distance operation, as this will drain the battery faster.