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What is the reason for the AUTO light being on in the Nissan Sylphy?

3 Answers
TuckerDella
07/29/25 10:15pm
The reasons for the AUTO light flashing in the Sylphy are: 1. Partial circuit failure in the car's computer; 2. The car's onboard computer fails to recognize the anti-theft chip. More details about the Sylphy are as follows: 1. The Sylphy is a compact car under Dongfeng Nissan, equipped with a 1.5L naturally aspirated engine, with a maximum horsepower of 135, and features like lane departure warning system, reverse warning system, multifunction steering wheel, and one-key start. 2. The Sylphy has a length, width, and height of 4641mm, 1815mm, and 1450mm respectively, with a wheelbase of 2712mm, and is equipped with a CVT continuously variable transmission, with a top speed of 186 km/h.
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OIris
08/15/25 10:40pm
That day when I was driving my Sylphy, I also encountered the situation where the AUTO light was on, which mainly means the automatic headlight system was activated. Pressing the AUTO button in the Sylphy will light up the indicator, indicating that the headlights will automatically turn on or off based on changes in light conditions. It's quite smart—for example, it automatically turns on the lights when entering a tunnel or when it gets dark, which is much more convenient. However, if it lights up for no reason under normal lighting conditions, it might be that the sensor is blocked by dust or malfunctioning, so you should pay attention to cleaning the probe area under the front windshield. I remember once after heavy rain, the sensor got dirty, and the light was on but not working, so I just wiped it with a soft cloth and fixed the issue. If cleaning doesn't solve the problem, it's better not to try repairing the electronic parts yourself, as it's easy to make mistakes. Just drive the car to the shop to check the fuse or circuits for safety.
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VonDylan
10/17/25 8:37am
My family uses a Sylphy. When the AUTO light is on, it usually means the automatic function is operating, mainly the automatic mode of the headlights. If the light remains on after turning off the button during the day when there's sufficient light, the issue might lie with the system, such as incorrect sensor detection or faulty wiring. Don't panic—try starting the car to see if the light can adjust automatically. If it stays on while driving but the light isn't on, the sensor might be blocked. When parked, open it up and simply clean the probe area, but be careful not to wet the circuitry. Additionally, check the fuse box to see if the relevant fuse has blown. If you're unsure, quickly contact a repair shop—they can diagnose whether the module needs replacement with their tools.
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