Why does the Audi Q3 keep stalling when braking?

[ColeFitz]

Stalling when braking may be due to the auto start-stop feature being activated. Principle of auto start-stop stalling: The auto start-stop system is essentially a system that controls engine shutdown or ignition. Its core function is to automatically control engine shutdown or ignition based on vehicle speed and stopping time during driving, aiming to minimize fuel consumption and emissions during idling. It is primarily designed for urban traffic situations like waiting at traffic lights or during traffic congestion. After the engine shuts down, the power supply can still replace the belt pulley to provide operational power for the engine cooling fan and the vehicle's air conditioning system. Features of auto start-stop: The auto start-stop system has many advantages, such as reducing fuel consumption during idling, which saves fuel. In urban traffic scenarios like waiting at traffic lights or during congestion, it helps minimize the idle running time of the engine. However, frequent engine starts and stops can cause damage to related components like the starter and battery. Additionally, due to the frequent repeated starts and stops of the engine, there is a higher demand for oil quality, leading to increased maintenance costs.