What is the problem with the Infiniti Q50 key system failure?

[Lucy]

The car key has power but cannot unlock. Possible reasons: 1. Damage to the key's control unit: The central control unit does not receive signals from the key. 2. Failure of the key's matching code: This is less likely to occur, but if it does, the key needs to be reprogrammed using a computer. 3. Fault in the central locking system: The door lock circuit may be burned out, causing a short circuit. 4. Poor soldering in the power distribution box: Poor contact due to weak soldering can also cause the sensor to malfunction. The most 'down-to-earth' method is to gently tap the power distribution box, which might re-establish contact at the weak soldering point. However, this is not a permanent solution, and professional repair at a specialized shop is still necessary.