What Causes the Auto Start-Stop Function to Stop Working?

[LaMarcus]

Here is a detailed explanation of the reasons why a car's auto start-stop function may stop working: 1. Accidental Press of the Start-Stop Button: Vehicles equipped with auto start-stop typically have the system enabled by default. If it suddenly stops working, it might be due to accidentally pressing the auto start-stop button, which turns the system off. 2. Complex Activation Conditions for Manual Transmission Cars: The auto start-stop function in manual transmission cars has more complex activation conditions. The system will only engage when it detects three actions: shifting to neutral, engaging the handbrake, and releasing the clutch. 3. Different Designs Across Brands and Models: The auto start-stop system varies by brand and model. For example, the system in the New Passat requires specific conditions to be met, such as fastening the seatbelt, closing the left front door, and then starting the engine. 4. Other Reasons: The function will not activate under the following conditions: the engine has not reached normal operating temperature, the auto air conditioning has not reached the preset temperature, the battery charge is insufficient, the steering wheel is turned after stopping, the vehicle undergoes emergency braking, or when reversing. 5. Auto Start-Stop System Malfunction: The system may fail due to wiring issues or other reasons. In such cases, it is best to have the vehicle inspected at a 4S shop.