Why Does My Auto Start Stop Not Work. There are many different reasons why this may happen. As automakers work towards improving the fuel economy of their vehicles, many have implemented start-stop systems in their cars. This technology allows the engine to shut off automatically when the vehicle comes to a stop, such as at a red light or in traffic, and then quickly restarts the engine when the driver lifts their foot off the brake pedal. While this system can be a great way to save fuel, there are a few reasons Why Does MY Auto Start Stop Not Work. We'll explore some of the most common causes of start-stop system failure. Battery Issues: The Start-Stop system relies heavily on the vehicle's battery to power the engine's restart after it shuts off. If the battery is weak or has a low charge, the system may not function properly. In some cases, the battery may need to be replaced or recharged to restore proper function to the start-stop system. Electrical Problems: The Start-Stop system is also connected to several other electrical components in the vehicle, such as the alternator and starter motor. If any of these components fail, it can cause the Start-Stop system to malfunction. Faulty wiring or damaged fuses can also lead to electrical issues that prevent the system from working as intended. Engine Temperature: For the start-stop system to work, the engine must be at a certain temperature. If the engine is too hot or too cold, the system may not activate. This can be especially problematic in very hot or very cold weather, where the engine may take longer to reach the required temperature. Driver Behavior: The start-stop system is designed to work automatically, but it can also be turned off manually by the driver. If the driver disables the system, it will not function until it is reactivated. Additionally, some drivers may find the system's automatic shut off and restart to be disconcerting or uncomfortable and may choose to disable it altogether. Mechanical Issues: Finally, there may be mechanical issues within the engine itself that prevent the start-stop system from working. This can include problems with the fuel system, exhaust system, or other components that impact the engine's performance. In conclusion, there are several reasons why the start-stop system on a vehicle may not work as intended. If you're experiencing issues with your system, it's important to have it diagnosed by a qualified mechanic who can identify the underlying cause and recommend the appropriate repairs. With proper maintenance and care, your start-stop system can provide a reliable and efficient way to save fuel and reduce emissions. If your vehicle has issues with the Auto Start-Stop System give us a call and it will be our pleasure to get your vehicle working correctly again.