Why did the Lavida key suddenly stop working?
3 Answers
The reason why the Lavida key suddenly stops working may be that the remote key battery is dead, or there is a signal interfering with the car in the parking place. Reasons for car remote key failure: Car remote control failure is caused by the presence of high-power radio signals of the same frequency in the surrounding area, which prevents the car's frequency signal receiving device from receiving the radio coding instructions sent by the remote key, resulting in the car remote control failure, such as being unable to lock or open the door. Composition of car remote key: It consists of a transmission switch, transmission antenna (keyboard), integrated circuit, etc. It contains an identification code storage circuit and an amplitude modulation circuit, and a knob-type lithium battery is installed on the opposite side of the circuit.
My Lavelle key suddenly malfunctioned last week, almost causing me to miss an important meeting. Later, I found out the main reasons were these: a dead key battery is the most common issue—this car uses a CR2032 button battery, which should be replaced every three years; if the car is near a high-voltage power station or signal interference zone, the key signal can be blocked—I experienced this in a mall basement once; another time, the key fell into water, short-circuiting the circuit board and rendering it useless. I recommend carrying a spare key for emergencies. If you don’t have a spare, you can press the faulty key against the push-start button to trigger the ignition. Avoid storing the key near your phone, as strong magnetic fields can disrupt the key’s chip. If all else fails, visit a 4S shop to reprogram the key—their diagnostic equipment is more professional.
Having repaired Volkswagen cars for ten years, I encounter two or three cases of Lavida key failure every day. The first step is to press the key button manually and check if the indicator light is on—if not, it means the battery is dead, and replacing it with a 5-yuan coin cell will solve the problem. If the indicator light is on but there's no response, several points need to be checked: try manually opening the car door with the metal key blade—if it works, it indicates a signal issue; if it doesn't, suspect a door lock block malfunction. Additionally, when the car battery voltage drops below 11 volts, the central control system will fail. Recently, I came across an interesting case where the owner had attached a metal sticker to the key, which directly blocked the signal. For self-troubleshooting, start by disconnecting the battery negative cable for five minutes to reset the system—this can resolve 70% of electronic failures.
