What to do if the 2021 Sylphy shows an idle start-stop malfunction?
2 Answers
Immediately turn off the engine, then disconnect the positive terminal of the battery. After 5 minutes, reconnect it, insert the key and turn it to ON until the dashboard indicator lights up, then remove the key after 30 seconds. Below are specific details about the engine auto start-stop system: 1. The engine auto start-stop system automatically shuts off the engine when the vehicle comes to a temporary stop (e.g., at a traffic light) and restarts it when it's time to move again. The STT intelligent fuel-saving system is a set of controls for engine start and stop. 2. It works by equipping a traditional engine with an enhanced motor that has idle start-stop functionality, allowing the engine to completely shut off when idle stop conditions are met. When the vehicle needs to move again, the idle start-stop motor system quickly responds to the driver's command, rapidly restarting the engine for seamless operation, thereby significantly reducing fuel consumption and exhaust emissions. 3. The STT intelligent fuel-saving system controls the engine's start and stop operations. The system uses a computer to determine the vehicle's status, such as when it's stopped at a red light or in traffic. The computer can then automatically stop the engine without affecting the use of in-car devices like the air conditioning or audio system. This technology can save about 5% of fuel under normal driving conditions and up to 15% in congested areas.
I also drive a 2021 Nissan Sylphy and have encountered issues with the start-stop system reporting faults. That time while driving, a warning suddenly popped up on the dashboard, which gave me quite a scare. The simplest method is to first check the battery status: the start-stop function requires sufficient battery power. If the voltage is low, the system will activate self-protection and display a fault. I tried restarting the car, which sometimes worked, but later found out it was a sensor issue that needed fixing. My suggestion is to first ensure all doors are properly closed and seat belts are fastened—these details affect the sensor's judgment. If that doesn’t work, head to the 4S店 immediately for a diagnostic code check—never attempt to fix it yourself, safety comes first. Also, pay attention to regular battery maintenance to prevent premature aging, ensuring the start-stop system operates stably.
