The outside temperature is too high or too low.
The wrong battery technology has been installed, which can only provide a small number of charging cycles. A similar protective mechanism operates in the following cases: However, if the battery only has a low charge, the Battery Management System (BMS) switches off the start-stop function to enable the engine to be started. The top priority for any battery is to start the engine. The battery management switches off the start-stop function The reason why the start-stop system does not function can be due to the interaction between both of these essential systems. It is often assisted by an intelligent Battery Management System (BMS), which is, so to speak, the brain of the car’s electronics.
You could say that the car battery is the heart of the system for modern vehicles. In addition to frequent engine starts, which the battery must supply for this process, it also supplies all of the electronic consumers even when the engine is switched off. As soon as the clutch pedal is pressed again, or the brake is released in the case of an automatic transmission, the engine starts again immediately. For example, if a car stops at traffic lights, the start-stop system switches off the engine. Because of this, by 2020 one in three cars on our roads will be equipped with this technology. Start-stop technology makes driving more economical and environmentally friendly.