Why Can the Key Unlock but Not Start the Car?

[DelaneyLee]

Key can unlock but not start the car because it needs decoding and installing a chip to start. Here are the specific reasons and solutions: 1. The key does not have a chip: Nowadays, cars use electronic injection keys with built-in chips. If only the key is duplicated without the chip, it cannot function properly. Solution: Drive to a car locksmith shop to match the chip and decode it. 2. The key is not registered: The car has an engine immobilizer function, and the key contains a chip. Solution: The new key must have a chip and needs to be decoded and registered using a computer. Only after the key is properly configured can the car be started. 3. The car does not recognize the key: The car's anti-theft system may not recognize a key that was not originally provided by a 4S store and has not been matched with the vehicle. This means the duplicated key's teeth may match the original, but the car's anti-theft system prevents starting as it considers it a theft attempt. Solution: Match the key with the vehicle.