What does it mean when the key malfunction light appears in a Sylphy?
2 Answers
The reasons for the key malfunction light appearing in a Sylphy are: 1. The smart key antenna connector in the trunk has come loose; 2. The car cannot detect the key; 3. The smart key battery is low; 4. There is an issue with the chip inside the key, or the signal transmitted by the chip is incorrect. Taking the Sylphy 2021 Classic 1.6XL Manual Luxury Edition as an example, this is a compact car under Dongfeng Nissan, equipped with a 1.6L engine and a 5-speed manual transmission. The car body type is a 4-door 5-seater sedan, with a front MacPherson strut independent suspension and a rear torsion beam non-independent suspension, featuring front-wheel drive.
I'm familiar with the key light issue on the Nissan Sylphy—it usually means the key battery is running low. My car had the same problem recently, and I had to place the key in the induction area below the steering wheel to start the engine. It could also be due to poor chip contact if you've dropped the key—my neighbor's key light came on after it fell into water. With so many charging stations in malls these days, stacking your key with a phone can also interfere with the signal. My advice? Try replacing the CR2032 coin battery first—it's just a ten-yuan fix. After replacing it, hold both the lock and unlock buttons for five seconds to reset the key. If that doesn’t work, you might need to check if the signal receiver in the ignition is faulty. Cars with aftermarket infotainment screens are especially prone to this issue since the factory wiring gets modified.
