Why does the 14th-generation Sylphy's auto start-stop system malfunction?
2 Answers
14th-generation Sylphy's auto start-stop system may malfunction due to the following reasons: 1. Insufficient battery power: The auto start-stop function typically fails when battery charge drops below 60%. 2. Throttle valve malfunction: The engine auto start-stop system automatically shuts off the engine when temporarily stopping during driving, and restarts it when needing to proceed. Below is how the start-stop system works: When the vehicle stops due to traffic congestion or at intersections, the driver presses the brake pedal and shifts to neutral. At this point, the Start/Stop system automatically checks that the engine is idling without being in gear, the wheel speed sensors of the anti-lock system show zero, and electronic sensors indicate sufficient energy for the next start. When these three conditions are met, the engine automatically stops running.
As a long-term owner of the 14th-generation Sylphy for nearly three years, I occasionally experience sudden malfunctions in the auto start-stop system, which can be quite annoying during drives. The most common issue is battery aging, as this system relies on frequent battery-powered engine ignition. If you frequently take short trips or the battery charge is insufficient, the vehicle's computer will automatically disable the function to protect the car. Additionally, the system may temporarily suspend operation after self-diagnosis when engine coolant temperature is too high, air conditioning is set too strong, or when parked on slopes. Usage environment also plays a crucial role – for instance, in extremely cold winters when battery performance declines, malfunctions become more likely. I recommend regularly checking battery status and promptly replacing aged components to minimize such issues. Developing good maintenance habits can save considerable trouble, as the system was originally designed for fuel efficiency and environmental protection.
