Why can't the car key unlock the car even though it has power?
2 Answers
Possible reasons include a damaged key transmitter or an invalid key matching code. Here is relevant information: Damaged transmitter: The car key's transmitter might be damaged. The best way to check this is to use the spare key. If the spare key can start the car, it indicates that the transmitter of the original key is damaged. In this case, you may need to visit a 4S store to have a new car key programmed. Damaged receiver: The issue could also be due to a damaged car receiver. If neither the regular key nor the spare key can unlock the car, it is highly likely that the car lock's receiver is malfunctioning. It is advisable to visit a 4S store for prompt resolution.
I've experienced situations where the car key couldn't unlock the vehicle despite having power, and upon reflection, common causes include signal interference or internal key issues. Like that time in the mall parking lot, the key's indicator light was on but it just wouldn't respond—turned out a nearby large electronic billboard was interfering with the signal transmission. Other possibilities include oxidized battery contacts not making full connection, leading to unstable current; or slight damage to the key's circuit board causing it not to send the correct command when pressed; the vehicle's receiver module might also be faulty, requiring professional equipment to diagnose. It's recommended to first try moving away from potential interference sources or cleaning the contacts; if that doesn't work, use the mechanical key to unlock and then take it to a repair shop for inspection. For prevention, regularly clean the key contacts and avoid storing it in high temperatures to extend its lifespan. Don't underestimate this issue—it can easily cause inconvenience and even affect driving safety.
