What does it mean when the i-stop yellow light is flashing?
2 Answers
i-stop yellow light indicates that the auto start-stop function is turned off. Here is an introduction about the auto start-stop function: 1. Definition: Auto start-stop is a system that automatically shuts off the engine when the vehicle comes to a temporary stop (such as waiting at a red light) during driving, and automatically restarts the engine when it's time to move forward again. 2. Main purpose: It is used when the vehicle is moving at low speeds or making repeated stops. It can automatically turn off the engine to avoid unnecessary fuel consumption, reduce the vehicle's idling time, and consequently decrease engine carbon deposits.
When I saw the i-stop yellow light flashing, my first reaction was that there was a problem with the system, indicating that Mazda's auto start-stop function couldn't work properly. The most noteworthy possibility is a weak battery, as the start-stop system is particularly power-hungry, and the battery tends to lose capacity after two years of use. A malfunctioning alternator not charging the battery can also cause this issue—you can check if the dashboard voltage display is below 12 volts. A faulty brake vacuum sensor, which manages the vacuum boost pressure, can also trigger the yellow light to flash. Additionally, the system may automatically disable the i-stop function when the engine is just started and the coolant temperature is low or when the air conditioner is set to strong cooling. It's recommended to prioritize checking the battery status or using a diagnostic tool to read the fault codes. After all, while a malfunctioning auto start-stop is a minor issue, a dead battery leading to a roadside breakdown would be far more troublesome.
