What are the reasons for the failure to recognize the smart key?

[PaisleyLynn]

Failure to recognize the smart key may be due to a dead battery in the remote or signal interference near the vehicle. The following are precautions related to smart keys: 1. Do not place it with electronic devices: Since smart keys use low-intensity radio waves, they may not function properly in the presence of magnetic interference. Frequently placing the smart key and a mobile phone together can inevitably cause the key to malfunction, as the chip inside the smart key may sometimes be interfered with by the phone's frequency, leading to temporary failure of the remote function. Additionally, if the smart key receives high-intensity radio waves, it may excessively drain the battery. Therefore, do not place the smart key near electronic devices, such as TVs or personal computers. 2. Avoid rough handling: Smart keys are most vulnerable to damage from being dropped from a height, as most smart key casings are sturdy but the internal circuitry has weak impact resistance and can be easily damaged by severe collisions. Moreover, if a smart key gets wet, the internal circuitry may short-circuit, also causing the remote to malfunction. 3. Do not leave the spare key in the car: Losing a car key can cause many inconveniences, especially for smart keys. Once lost, not only does it require a replacement to be made, but it also needs to be reprogrammed with the car's computer. Unlike traditional mechanical keys, smart keys involve the vehicle's anti-theft technology, so simply making a new key is not sufficient for continued use. It is understood that each manufacturer has strict procedures for keyless entry and key replacement in their after-sales service departments. Therefore, it is important to protect the spare key properly—do not store it with the primary key or leave it inside the car.

[ThomasAnn]

I've encountered this situation a few times, and it's quite annoying. The most common reason is a dead battery in the smart key, especially after two or three years of use. When the battery runs out, the signal becomes too weak for the car to recognize. Another reason is signal interference, such as in crowded parking lots where other electronic devices or metal objects—like phones, power banks, or keeping the key in a wallet with metal cards—can disrupt the signal. If the key itself is faulty, like after being dropped or exposed to water, or if the internal chip is damaged, the key becomes useless. Issues with the car's receiver are also not uncommon; the system might misjudge or freeze. I recommend first trying a new battery—you can easily buy a button cell at the supermarket and replace it yourself. If that doesn’t work, move away from potential interference sources and try again. It’s also good practice to carry a spare key to avoid awkward situations and check the battery annually to save trouble. In short, don’t ignore it, or you might end up unable to start the car, which could affect safe driving.

[StBeckett]

I've pondered this issue too. Simply put, smart key failures mainly boil down to three things. A low battery is the number one culprit – if you keep using it without replacing the battery, the signal can't be transmitted. Signal interference is also quite common, especially near high-speed rail stations or large shopping malls where the electromagnetic environment is complex, causing signal blockage just like when a phone loses reception. Additionally, hardware failures in the key, such as worn buttons or internal circuit short circuits, can lead to recognition failures. The solutions aren't difficult. I often first try placing the key close to the car door's induction area, which sometimes wakes it up. If that doesn't work, replacing the battery usually does the trick. To prolong its lifespan, avoid exposing the key to high temperatures inside a car or getting it wet with water. Before driving, test the key signal by pressing the unlock button to see if the light comes on – prevention is better than cure. Don't be careless to avoid mishaps at critical moments.

[DelMatthew]

Smart key not recognized? Most likely the battery is dead. I've made this mistake myself - after prolonged use, the coin cell battery drains, signal strength drops, and the car can't detect it. Signal interference is also common, like near high-radiation devices or when the key is placed in a metal container. Recommendation: check the battery, replacing it costs just a couple dollars. Regular maintenance can prevent such hassles.