Why Can't the Tesla Card Key Open the Door?
2 Answers
Tesla card key failing to open the door can be attributed to several reasons. The main causes for a Tesla card key not opening the door include the following: Foreign objects on the sensing area: If the Tesla card key is unresponsive, check if the card is correctly placed on the sensing area. Water stains or dirt on the sensing area can also affect NFC recognition to some extent. NFC module malfunction: If none of the above issues are present, the problem might lie with the NFC module or the card itself. In such cases, the only solution is to visit a Tesla 4S store for assistance. Generally, an NFC sensing module issue does not affect vehicle locking or unlocking. If the NFC sensing module malfunctions, you can use the key or the app to unlock the car.
I've encountered this issue a few times. Sudden failure of the card key is mostly caused by these reasons: The card itself may have been magnetized or demagnetized by a phone (avoid placing it too close to phones), or the chip position might be worn out. Sometimes, the B-pillar sensing area can be blocked by mud or film covering the recognition point, so it needs to be cleaned. Temporary system crashes of the car key are also quite common. When this happens, don't rush to replace the key; first try unlocking with the mobile app. If successful, it indicates a card issue. Then, try placing the card near the window frame for assisted sensing. If all else fails, hold down the left and right scroll wheels on the steering wheel for 10 seconds to reboot the car's system. Avoid trying too many times in extreme heat or freezing conditions, as failures are more likely in extreme temperatures. Tesla customer service has mentioned that if the spare key also fails, it might be due to low voltage in the car's auxiliary battery, requiring a scheduled inspection.
