Does the Auto Start-Stop Function Cause the Engine to Shut Off When Shifting to P Gear?
2 Answers
It may be caused by the auto start-stop function being activated when shifting to P gear and pressing the brake pedal, leading to automatic engine shutdown. Working principle of the start-stop system: When the vehicle stops moving due to traffic congestion or at an intersection, the driver presses the brake pedal and shifts to neutral. Once these three conditions are met, the engine automatically stops running. Operating state of the start-stop system: The start-stop system is translated as the Start-Stop system in English; when the vehicle is in a stopped state (not in park), the engine will pause operation (instead of maintaining traditional idle speed). During this pause, the lubricating oil inside the engine continues to circulate, ensuring internal lubrication.
The other day when I was driving to pick up a friend, I noticed the engine shut off by itself while waiting at an intersection with the gear in P position. This is actually the auto start-stop system functioning normally, and it's not related to being in P gear. I specifically consulted a friend at the repair shop - this system triggers engine shutdown whenever the vehicle comes to a complete stop, whether by braking or shifting to P gear. Especially with the AC running in hot weather recently, I've observed that when start-stop activates in P gear, the AC temporarily switches to fan-only mode. However, it's worth noting that repeated P gear shifts causing engine shutdowns can be quite annoying when searching for parking spots - in such situations, I simply turn off the start-stop function. Additionally, if the battery charge is insufficient or the outside temperature is too low, the start-stop system may automatically suspend operation, which are all normal protective mechanisms.
